Bill was surprised at Benny's... Jessica's... news, but realized he should have seen it coming. Walking through the house on one of his "breaks" between Jenny's "visits", he spotted a sticky note on the wall. Horrified, he picked it up anyway, reading what would happen to him next. "I wish I had a body that looked like someone else in my family."
A split-second later, he felt much smaller. The mirror in the bathroom showed a very familiar sight. Jenny, as she had been before the wishes... though definitely much looser than she had been. He'd become his own daughter. "Hi!" Her high, cute voice spoke to him, and he grinned. This was very nice. He'd gone from a large, hairy, slightly overweight man with breasts to a cute little eight-year-old girl.
Suddenly, another cute little eight-year-old girl walked into the bathroom. One with a large penis and sack, even larger on her small frame. "Daddy?" She looked at him, grinning. Her cock stood at attention, and he smiled back. "I'm your sister now, Jenny."
Jenny grinned even wider, and pulled him into a hug, cock rigid and up between them, rubbing against his chest. "Can we still do fun things, little sis? Like we did before when you were daddy?" He was indeed a little shorter than her, and about half a year younger, if he was her before the wishes.
"Of course, big sis." He giggled. Being a little girl would be fun, and he could wear the same pretty clothes as his big sister.