There you go, your wanted Fred/Hermione/George! And it's exactly 100 words! Enjoy!
Fred and George were stood in their lab, they had no idea what had happened, their experiment had definitely gone wrong, Fred looked down and covered himself, and hid his eyes from George, a laugh behind them made them both turn to see Hermione stood there as bare as the day she was born, the experiment had blown up and swiped away all their clothes, Hermione's eyes were wandering up and down both twins and noticed the obvious arousal from both, she walked over to the door, locked it, and licked her lips with her tongue, watching their eyes widen.
Please review, telling me what you'd like next:
a)Fred/Hermione - Give me an idea!
b)George/Hermione - I have an idea, but you can give your own!
c)Another threesome?
or d)Some other completely different couple?
Let me know! XD