"Mommy!" An unfamiliar little boy ran up to Biff, wrapping his arms around his waist.
"What the hell? I'm not your mom, kid. I'm a guy," But as he spoke, his voice changed, and the little boy's arms extended further around. The boy didn't have to look so far up to see him.
"Yes you are. You're my mommy and I love you. Can I have some Oreos?" Before he could answer, Sarah walked up behind the boy, looking Biff in the eye.
"Mom, I'm going out with the girls, alright?" She looked at him evenly, as if there was nothing wrong.
"Sarah, what the fuck are you talking about? I'm your boyfriend! Biff, remember?" He stammered, no longer sure.
Sarah laughed at him. "Since when do you cuss? Biff is right here, Mom." Another person walked up out of nowhere: himself.
"Something wrong, Mrs. McMillan?" His double asked, and he felt tears spring to his eyes. He wasn't a mother! He was a seventeen-year-old boy! He was a quarterback for the football team, not a wife and mother! Shame filled him as he burst into tears, and Sarah, the little boy and the other Biff walked away, all laughing. "She's lost it," He heard himself say. Suddenly, he noticed that he was in the mall! People were looking at him, but his eyes were dry. He felt unusually cold, and looked down to see bare breasts! He was naked!
"Try our latest perfume, ma'am?" A perky redheaded girl holding a small bottle walked up to him, and he felt a warmth in his crotch; he'd love to get into her pants. She looked down and jumped back, screaming, "Eww! You're wet! Ugh, I'm a lesbian's wet dream." The girl ran away, and the intermittent laughter in the mall crowd intensified. Biff felt a jolt like an electric shock, and smelled a rather familiar scent. Female arousal. His eyes snapped open to Sarah's ceiling; she slept with a light on, and he looked down to see his nipples standing at attention, a strange sort of fleeting warmth running through them, and in his crotch. The nightgown had a wet spot on it, and his mind was clouded with arousal, not thinking straight. He shoved his fingers inside himself, exploring and building up to greater heights of pleasure, moaning softly as he hit what felt like the center of it, fondling it as roughly and gently as he could. Biff's breathing was shallow, and he felt his other hand move up to his breasts of its own accord, playing with his nipples.
"What...?" He heard a sleepy murmur from above; Sarah, on her bed! The idea of being watched somehow made it even better, a naughty twinge of pleasure in his mind. "Mom, what are you doing on the floor...?" She shifted in her bed, nearly silent movements which were lost on the woman who used to be her boyfriend. "W-what the hell are you doing?!" Sarah yelled as her eyes focused, and she saw what was going on. "Biff!" The woman on the floor just continued, unaware of her on a conscious level but getting a perverse pleasure from Sarah's attention. Finally, she let out a ragged squeal of pleasure that Sarah knew all too well. Disgust and horror and fascination mingled in her expression, mirrored in Biff's as well as he realized what he'd just done. "Euuuugh..." Sarah flopped over onto the other side, burying her head in her pillows.
Biff sat still, trying to gather his thoughts in the aftermath but failing, just sitting there and breathing in rapid, shallow gasps. But suddenly, he felt a sort of itchy sensation all over, and before he could say anything, the pain came, overwhelming him for a moment then dulling enough that he could feel the extremely unpleasant sensation of his entire body expanding and rearranging. A tall, muscular boy sat on his girlfriend's bedroom floor wearing her mother's nightgown, which seemed to have stretched a bit along with him. It was a very uncomfortable fit, but still somehow fit without tearing apart. "Biff?" Sarah asked experimentally. "Is that you?"
"Yeah," He answered, delighting in the sound of his own voice. "It's me, somehow."
Sarah reached down and hugged him with one arm, and he hugged back, grinning, deliriously happy. "How will we get that nightgown off you without destroying it?"
All the happiness faded in an instant. "Shit."
