Try to get the original Sophie back

Sophie: "Let's think... The transformation happened after I fucked her, so maybe fucking her again will turn her into something else. Maybe even 'toggle' her back to normal? Anything's worth a try, since I don't know how the hell any of this stuff works."

You turn towards Sofia, who hangs her arms over the bed's headrest and looks at you with puppydog eyes.

Sophie: "You're pretty good at fellatio, but how about third base?"

Sofia falls back-first onto the bed in total submission. It honestly looks kind of off-putting.

Sofia: "Take me, please! Use me like a slab of cheap meat."

You straddle Sofia and begin to insert into her, but as soon as crotch touches crouch, Sofia starts to moan very loudly and obnoxiously.

Sofia: "UAAAAHGH! KIYYYAAA! HWAH! HWAAAH!"

You stop for a moment and glare at Sofia with slitted eyelids.

Sophie: "Do you mind?"

Sofia: "I-I CAN'T HELP IT! IT'S SOO-HO-HO-HOO GOOD! IT'S LIKE SEX BUT BETTER, IT'S SEXIER THAN SEX!"

Sophie: "You mean... sex to the second power?"

Sofia: "Ummm... I kinda don't know what that means, lol?"

This is another reason why you need the original Sophie back. Sofia isn't smart enough to understand even simple abstract comparisons - she's going to be really boring and tedious to talk to. You look for other things in a relationship besides just sex. Then again, can you say that you're in a relationship at all, since you're one and the same? At least, on some level.

In any case, a woman of your status of course has a ball gag, which Sofia seems more than enthusiastic to try, and which conveniently muffles a lot of her more spirited outbursts. You're unsure whether she's really cumming or not, because every thrust makes her quiver orgasmically, but you decide to just keep at it until something happens. Eventually something does happen: