Gibbs/Allison Series:

Choosing Between Old & New # 5

By: MChakotayParis (R. Mason)

A/N: This is a Hurt/Comfort/M/M slash (mild) story containing mild Adult Infantilism and Age Play. If any of these subjects offend you don't read. Any and all hurtful or flaming reviews will be reported and deleted. Any and all mistakes are mine.

This is another story in the Gibbs/Allison Series, involving Leroy Jethro Gibbs & Allison Grayson, so it might be a wise idea if you read the other stories first. They are in order "Gibbs' New Girl", "Switching Places", "Now it's My Turn", "Second Daddy".

This story is set between the ending of "Second Daddy" and Emily Fornell's acceptance of Allison as Ali.

When Jack makes an unexpected visit he discovers Gibbs relationships with Allison & Tobias.

Chapter 1

The weather was finally warming up in Stillwater Pennsylvania and after almost three and a half months of cold, wet, snowy weather Jackson Gibbs was getting cabin fever. He'd talked to his son during the holidays and it sounded like he'd finally found a family or friends to spend the holidays with. When he'd talked to Leroy at Christmas he could have sworn he heard the squeal of a young child in the background enjoying the delights of Christmas.

Now he wanted to see for himself if he had found someone to spend his life with. He worried about his only son, although he would never admit it to anyone, spending his life alone after the lost of Shannon & Kelly. He knew his other marriages were just temporary fixes for the lost of his first love and hadn't really been surprised when each of them ended. Now as Leroy got older he worried that he would become a lonely, bitter man always searching for love and having very few friends. He knew Leroy was a hard man to get to know and every harder to make friends with.

So when he'd heard the other voices and the child's squeal he had been surprised and it had intrigued him all through the winter months. Now that it was warming up he thought maybe a surprise visit was in order. When they started patching up their relationship, Leroy had told him that he always had an open invitation at his house. So he thought he'd take him up on it.

After making arrangements with the young man that helps him sometimes to take care of the store for a few days Jackson Gibbs packed a small bag and headed out towards D.C. to see him son.

-NCIS-

The weather was finally warmed up and while it was still a little chilly at night the days were warmer. For Gibbs, Tobias and Allison it had been a wonderful first Thanksgiving, Christmas and New Year, but just after the New Year things started getting hectic. Tobias and Gibbs both caught tough cases that had them both working long hours and even spending a few days away from home. So in the interim Allison had to step up, and during that time she started developing health issues.

At first it was just an upset stomach which over time developed into a serious problem. By the middle of February, just after Gibbs & Tobias finished their cases, Allison was rushed to the hospital. She ended up spending almost two weeks in the hospital for Gall Bladder surgery and pancreatitis. After being released Ali spent the rest of winter and the beginning of spring in total "baby Ali" mode mostly lying around the house.

It had been the first time since she'd been released that Gibbs and Tobias had let her spend the morning in the living room and she was totally enjoying herself on the "play" comforter. She'd finally convinced both Tobias and Gibbs to play with her on the comforter and never dreamed the conflict that a strange voice would cause.

-NCIS-

As Jackson Gibbs pulled into Leroy's driveway he knew that things had changed. The house looked the same on the outside but somehow felt different. Leroy had given him a key to the house so after grabbing his bag out of the car he entered the house to a strange sight. All the furniture was covered with dust covers and there was a fine film of dust on everything. As he aimlessly wondered through the house he noticed that all of Leroy's personal items were missing. After searching the upstairs and basement and finding more of the same Jackson left the house and headed towards the neighbors. After knocking at several houses he finally found someone at home in the house just across the street.

"Excuse me, my name is Jackson Gibbs and I'm looking for my son Leroy? He lives in the house across the street."

The lady that opened the door stared for a few minutes then broke into a wide grin as it dawned on her who he was referring to. She could tell that this man was related to Gibbs by the stunning blue eyes and dimples when he smiled. She had lived across the street from the man the street knew only as Gibbs for nearly twenty years now and it still amazed her to see him smile and laugh. In the ten or so years since the small dark haired woman had come into his life he had changed. They still saw them every other weekend but no one was surprised when he moved all of his belongs out of the house and moved in with her.

"Oh I'm sorry but he doesn't live there anymore. He moved in with his little Ali about ten year's ago." said the woman.

"And just who is Ali?" asked Jackson slightly agitated.

"Oh I'm sorry, Allison Grayson. I think I have her address around here somewhere if you'd like it?" said the woman as she left the door open and went to a small desk in the hallway. After a few minutes she returned holding out a piece of paper.

Jackson Gibbs looked at her then the piece of paper for a few minutes then smiled and took it. The address was only about twenty minutes or so away he figured he could get there before he had to worry about finding somewhere to stay. After thanking the woman Jackson headed back towards his truck only to be stopped when he heard the woman calling.

"Oh Mr. Gibbs, would you ask Gibbs to stop by next time he's at the house. I know he told us not to buy her anything but I found the perfect present for Ali, but since she's been sick I didn't want to disturb them."

"Of course and thank you for the information" called Jack as he threw his bag into the truck then climbed in.

As he pulled away he tried to digest the information he'd just received. Leroy had moved out of his family home to live with a woman he called his "little Ali". Well things have certainly changed since he'd last seen his son and he had a lot of explaining to do. Twenty minutes later he drove around until he found the address on the paper.

The house was a three story Victorian house, with a two car garage and a large backyard. He could see Leroy's sedan and a dark color SUV parked in the driveway. After parking his truck in front of the house he checked out the garage seeing Leroy's charger and another SUV inside. As he climbed the stairs, he found the big heavy door slightly ajar, gently pushing the door open a little further and entered, following the one familiar and two strange voices he saw a sight he never thought he would in his whole life.

-NCIS-

Ali, Gibbs and Tobias had been playing on the comforter most of the morning and when Tobias noticed Ali was wet he smoothly got up and retrieved a dry diaper for Ali. Since they'd been letting her come down stairs they had started keeping several stashes of diaper supplies in the living room and had made up the spare bedroom downstairs as a second room for her. As Tobias grabbed Ali a clean diaper Gibbs looked over their little girl. This had been the first time that Ali had spent the whole morning downstairs and he didn't want to tire her out.

"How you feeling baby girl?" asked Gibbs as he gently rubbed her check.

"I'm good Daddy, my tummy hurts a little but not much?" answered Ali as she reached to scratch her stomach but Gibbs grabbed her hand stopping her.

"Tobias, bring her lotion to" called Gibbs as he gently raised her top. The incision in the middle of her stomach was slightly red.

As Tobias returned he handed Gibbs her supplies then asked. "How's she doing?" as he stood over the two most important people in the world to him.

"She's fine Tobias, her incision is just bothering her a little" answered Gibbs as he started changing her.

As he undid Ali's diaper tabs and gently cleaned her, a familiar but very upset voice rang out. "Leroy Jethro Gibbs what in the hell are you doing?"

As he stopped, looking up, he left Ali exposed until he heard her little whimper then quickly looked back at Tobias and asked "Tobias, would you finish taking care of Ali while I deal with this" then quickly stood and walked over to grab Jack's arm pulling him out of the living room.

Tobias quickly replaced Gibbs changing Ali swiftly and efficiently, then helped her to stand, listening to the angry voices in the foyer.

"Dad, what are you doing here?" asked Gibbs as he turned to face the irate man.

"Answer my question first? What were you doing to that woman?" said Jack as he pulled his arm out of Gibbs grasp.

"That woman is my daughter Ali, and I was changing her diaper"

"Your daughter! Kelly was your daughter, that woman is…is…I don't know what to call her"

"Be careful what you say dad, Ali may not be my flesh and blood but she is very much my daughter"

"Why were you changing her diaper, is she mentally or physically damaged?" asked Jack

"No, Ali is both mentally and physically fine with the exception of just being released from the hospital for Gall Bladder surgery."

"Then why does she wear diapers, she a grown woman for Christ sake!" exclaimed Jack.

With an exasperated sigh Gibbs looked into the living room to see Tobias and Ali still standing on the edge of the comforter. At Tobias' nod he once again turned to face his father.

"Ali practices Adult Infantilism, wearing diapers, drinking from baby bottles and sucking on a pacifier" explained Gibbs as he looked at the man in front of him hoping he would understand.

A few seconds later his hopes were dashed as Jack exclaimed loudly "She what! But she's a grown woman. Why in heaven's name would you give up a perfectly good house to live with…with….that!" then he moved passed Gibbs to look at the woman in question.

Ali was standing in the living room in the arms of another man clutching his waist silently crying. As Gibbs looked passed his father he nodded for Tobias to take Ali out of the room then turned back towards his father.

"Jack, you may be my father but remember you are an uninvited guest in Ali's house."

"So it's her house, are you and that man servicing her as well" asked Jack harshly, then and instant later felt the punch as his son's fist connected with his jaw.

"Jethro!" yelled Tobias as he quickly released Ali and grabbed Gibbs before he hit the older man again. "Don't, think of Ali"

After a few minutes of deep breaths he broke free of Tobias' grip and looked around "Where's Ali?" asked Gibbs not seeing her in the room.

"I'll find her, you stay here and talk to Jack" responded Tobias, then patted Gibbs arm and left to look for Ali.

"This house is in Allison's name, but it belongs just as much to Tobias and I as Ali. And I am in a relationship with Tobias, not Ali. My relationship with Ali is a father/daughter relationship nothing more."

"Nothing more, Leroy she wears diapers!"

"It's complicated Dad" answered Gibbs with a sigh

"Complicated, Leroy, she an adult, she needs to grow up!"

"He's right Gibbs, maybe it is time for me to grow up" replied Ali from the banister upstairs. She was standing there wearing a pair of sweatpants, tee-shirts with a small bag at her side. "Good bye Papa, Daddy. I love you." At those words Allison descended the stairs slowly then ran as fast as she could past both men gathering her car keys, and quickly left the house slamming the door behind her.

"Ali!" called Gibbs and started to follow her until he stopped at Jack's voice.

"Let her go Leroy." said Jack softly

At his voice he stopped, looking at his father then slamming his fist into the nearest wall, exited out the sliding doors to the backyard.

"Leroy" called Jack as he started to follow Gibbs but was stopped when Tobias grabbed his arm.

"I wouldn't if I were you. He'll talk, but not now"

"And you are?" asked Jack as he looked at the older man holding his arm.

"I'm Tobias Fornell, your son's lover and "papa" to Ali" responded Tobias as he let the older man's arm go.

"God what has Leroy gotten himself into" asked Jack as he followed Gibbs' path to find his son pacing and occasionally punching a tire that was hanging from a tree.

"Probably the best thing in his life" answered Tobias quietly as he watched his lover pace the backyard.