(Note: This is mostly A51's 'Biff tries to hang on' bit, with some slight variations to try and give the new Biff some distinctions from Jon/Jonell personality wise. Credit to him for the majority of this piece)
Biff shook his head, then slapped himself across the face. I've got to focus! he yelled in his head. He had to stay himself. No matter what he looked like on the outside, he was still Biff Meadows on the inside. He looked down at that moment into the cleavage of his now bigger breasts. They must have been at least a D-cup right now, just like the ones that his girlfriend Sarah McMillan had. Wait, his girlfriend Sarah? His girlfriend was Yuki and she was sitting right over there on the lounge chair looking all hot and studly. Wait a minute, studly? Biff yelled in his head again. Focus! I can't forget who I really am.
But the more time that passed, it was becoming increasingly hard to stay resistant. He felted a growing part of him want these changes, loving how sexy he was becoming. At this rate, he would look even better than Jon, that dumb slut. Someone a stupid as him didn't deserve such a good body. Not that Jon would have anything on Biff, once he was done. No, once he was done, Biff would have a body that every man would lust for and every woman envy. Biff smiled at the though, then slapped a hand over his mouth No! I won't give in!
He looked over at Yuki again. His memories told him that she wasn't his girlfriend, but his feelings told him otherwise. She looked in his direction, causing him to look away suddenly. His eyes happened to fall on Jon, who didn't look male in the slightest by now. In fact, his transformation seemed to be complete.
I'm next, Biff thought, with a shudder.
Jon walked over to the pool, looking to jump in.
"Jon, don't go in the pool," Biff said, his voice even higher than a minute ago, and sounding much more girlish. He thought that going in the pool would cause some sort of change, but it was really just a metaphor for "giving into the changes", which it seemed that Jon already had.
"Who's Jon?" the hottie in the red sling bikini asked. The woman who Jon had become was quite a sight to look upon, with long dark brown hair that descended to her butt in waves. Her figure had blossomed to near stunning proportions, with a waspish waste and DD cup breasts which were barely covered at all by the straps of her bikini. Her hips were wide, her sizable butt accentuated by the thong of her bikini. The bikini was stretched so tight by her breasts and rear that it left nothing to the imagination around her crotch, hugging her feminine slit tightly. Her face was beautiful and slightly exotic, with full lips and caramel colored eyes which complimented her thorough tan nicely. "My name is Jonell. You know that."
Then she jumped in the pool.