A slurping sound followed by a wet plop momentarily distracted Biff from his newly changed voice. He looked at where the sound had come from and saw the double ended dildo that his penis had become lying on the floor of the car. He saw that Sarah was back to being entirely a girl again.
Biff quickly scooped up the dildo before Sarah could try to grab it again. He noticed that the two ends were even more disproportionate than they had been before. The large end was now at least 11 inches long and quite substantial in diameter as well, while the smaller end was barely 3 inches long. The lump in the middle that had been his balls was now barely the same size as the larger shaft.
"What are you going to do with it now?" Sarah asked curiously.
"I don't know." Biff said in his new high pitched voice.
"It will be okay baby." Sarah said leaning in to give Biff a kiss.
Responding automatically Biff accepted the kiss and began kissing her back. Forgetting his strange situation he slowly slid his hand up Sarah's chest and began fondling her breasts again.
Soon Biff felt Sarah's hand unbuttoning his pants and then sliding into his underwear. He gasped as her hand touched his clit and then moaned as she slid a finger into his vagina. He knew it was wrong to let Sarah do this to him but it felt so good he didn't even think about telling her to stop.
Soon she was tugging his pants down and he was helping her.
"Let's take this to the back seat." Sarah whispered in his ear. Biff followed her suggestion, ditching the rest of his clothes on the way.
"Now lay down and spread your legs." Sarah commanded. Again Biff did as he was told. He'd never been so docile and compliant before and wondered briefly if that was another change that had happened to him.
Soon Sarah had her head between his legs and was eating him out. Biff's breathing was becoming faster and more irregular as he felt the now somewhat familiar build to a female orgasm beginning in his crotch.
Biff had his eyes closed so he didn't see it when Sarah reached into the front seat of the car and grabbed the dildo from where Biff had dropped it.
Sarah could tell Biff was close to orgasm by the frequent gasps and high pitched feminine moaning that escaped his throat unbidden. When Sarah was sure that Biff wouldn't be able to take much more she quickly slid the large end of the dildo into Biff's vagina in a single thrust.
A feminine shriek of startled pain and pleasure erupted from Biff as the sudden penetration sent him over the edge. Fluid gushed from his pussy around the huge dildo spraying over a large part of the back seat of Biff's car.
Sarah watched Biff lay there for quite some time occasional spasms making his body twitch. That had been one of the sexist things that Sarah had ever seen let alone participated in. Eventually Biff's body stopped spasming as he drifted off to sleep.
Sarah tried to retrieve the dildo from Biff's pussy but she was foiled by the discovery that it was once again part of Biff's body; though only the tiny 3 inch penis and matching testicles were there. There was no sign of the monster sized end that she had shoved into Biff not long before.
