Jon nearly shuddered at the sight. There was no mistaking it. Biff now had his mother's face.
"What's wrong, honey?" his "mother" asked. It was so bizarre to hear Biff's voice say it instead.
Jon looked him (her?) up and down, and that's when he noticed the crotch region. There was no bulge in the pants.
"Mom," Jon said, hesitantly. This situation was so messed up. "Are you male or female?"
His mother looked strangely at him. "I'm female, of course," she said, even though she didn't sound like it.
"Then why do you look like a guy?" he asked.
She looked oddly towards him again. "Why are you asking these questions?"
"Please, Mom. Just answer it."
"I've always looked like this. You know that. But I'm female where it counts," she said, gesturing towards below her waist. "Otherwise I couldn't have given birth to you, Zoe, and Mikey."
Suddenly, the doorbell rang.
"That's Athena, Mom. We're going out," Zoe said from the living room. Jon heard Sarah's voice, but he had to remind himself that that was Zoe now.
"Okay, honey. Have a good time," Jon's mother said. It still sounded so weird hearing her say it with Biff's voice.
Jon walked into the living room just in time to watch Zoe open the front door.