Melissa walked down the hall towards Jon's bedroom, which is where she assumed Biff and Sarah were. But she stopped when she heard gasping and moaning coming from Zoe's room. She opened the door and stared at Biff with wide eyes. He was having sex with Zoe, and Sarah was massaging Zoe's naked body! She was even occasionally kissing her!
"What's going on?" Melissa asked, shocked at what she was seeing.
Biff looked up at her and grabbed the stone again.
"Melissa, wait up," Jon said, from the hallway.
Biff clutched the stone and quickly said "I wish ..."