A/N: This is a scene I just thought about and decided to write down.
"Lube me up." Harry and Romilda were in the Room of Requirement. Harry stood in front of the bed, while Romilda was on her knees. He'd unzipped his pants so that his member was exposed for Romilda to see. It was hard and pointed right at her face.
"Yes master." She wrapped her hand around the shaft and rubbed the tip on her lips. Her tongue darted out, tickling Harry. She stroked him as she licked the tip. Her lips parted and slipped over Harry's erection. She forced it deep into her throat. She ran her tongue down the length of Harry's shaft. He put his hand on the back of her head and shoved her further down his member. He could hear gurgling and coughing sounds as he did this. He looked down to see a mixture of drool and precum coming out of the side of her mouth. She took her hand off the shaft and started tickling Harry's balls. This was almost too much. He pulled away. "What's wrong?"
"That's enough slut," said Harry. "I'm lubed up enough. Get up and strip down."
"Yes master." Romilda got up and removed her robes. She unhooked her bra, letting it fall to the ground. After that, she shook her chest slightly, causing her breasts to jiggle. She then slide her underwear down her legs. Now that she was naked, she stepped forward to kiss Harry. He held up a hand to stop her.
"Get on the bed," said Harry. "And lay on your stomach."
Romilda sighed and did as she was told. She turned back to Harry. "Like this?"
"Yes, I like," said Harry.
"Now what?" said Romilda.
"Now I suggest you bite that pillow." Harry got behind her and spanked her ass. She moaned in surprise as her flesh rippled. Harry squeezed her rear, kneading her flesh in his hand. She stared at him, a look of excitement on her face. Harry spread her cheeks apart and lunged forward. Romilda's eyes widened and her jaw dropped as he impaled her ass. She buried her face in the pillow. Her hands clutched the sheets. Harry's member was met with a tightness, as her body snugly squeezed him. He grabbed her thighs and used the leverage to thrust himself forward. Romilda's back spasmed as he pushed inside her. He could see her fists tighten around the sheets. Her ass rippled with Harry's motion. Harry's hands travelled up from her thighs and to her waist. He felt her wetness. He ran his fingers over her sex. She shuddered. Harry's fingers found Romilda's clit and began rubbing it. He started by circling it with his thumb. He then took his index and middle finger and started rubbing her clit furiously. Romilda raised her back slightly and let out a groan. Harry continued to pound Romilda. There was a great pressure around his member. As her ass rippled, he spanked her. Then Romilda cried out. Harry could feel her ass tighten around him. This was enough to send him over the edge. He fired his load into her ass.
Harry pulled out of Romilda and went to get his clothes. Romilda lay on the bed, a dazed look on her face. "Wow, you were incredible."
"I know," said Harry.