Yeah, but there's no straight scenes...
I've written the "converting lesbians" scene in my stories more than once. First, you'd mind control her so that every time she sees you, she gets mildly aroused. Enough to notice, not enough to be debilitating. Next, she finds out that every time she's playing with her dildo at home, right before she reaches climax, she starts thinking about your d*ck. That of course immediately ruins it and shocks her away from the climax. The more often that happens, the more sexually frustrated she gets (FBBS = Female Blue Balls Syndrome). Eventually, maybe at the urging of fellow lesbians, she just has to try you out (to get it out of her system). That of course is the best release she's had in ages, so she's hooked. She notices that you're the only guy she feels that way with strangely enough. She could at that point either fall in love, or periodically use you for your body.
In SP, I'd first put in a Mind Control option similar to Family Ties or Professionalism, called Reorientation. Once set, every time Billy meets Nikki in the Hallway, Cafetaria or after Class, it triggers an if-statement saying "Nikki looks at you strangely for a moment, but the moment passes." In the background, it increments a hidden counter.
Now, every time you perform any sexual act with her as Billy Jean, the counter goes down again. But if you do nothing more than socialize, it will keep growing until...
When the counter gets high enough, next time you see her, it'll say "Nikki jumps when she sees you, excuses herself and quickly runs off to the bathroom. When she comes back, she looks flushed. You could swear she's throwing you an angry look. Probably just your imagination." The counter goes down again, to a value just below the above scene. A second variable gets set to True.
At this point, if you initiate sexual contact, it will be a straight scene (she has no willpower left to fight the feeling), where Billy f*cks her completely silly until she's lying breathless on the floor after finally having the release she's been waiting for for so long. Unless her Love is high enough, it may slightly raise her suspicion. The counter resets to zero and the second variable to False. Either keep it like that (starting the whole thing over), or code in straight scenes from that moment forward (until you take away the Reorientation Mind Control program).
But... if you're patient and
not initiate sexual contact, the next time the counter reaches its maximum, it triggers a scene similar to Obsessive/Nympho, where Nikki pulls Billy to the nearest non-Public place and proceeds to ravage him to get off. Once again, reset the counter and switch to straight scenes. Or not, since she initiated it.
Keep her love above 80, or she'll start getting suspicious. Why just Billy and no other guy? This actually works well within the current game mechanics, since
just using her in the sex scenes lowers a girl's love, but being Generous (taking care of her) will keep it high. You'd have to choose every time: do you just want to use her, or do you want to show her the joys of being straight? If you just want to use her, you'll have to keep her in love with you.
It could even be possible to link part of it to Willpower. As long as you keep her Willpower low enough, she won't be able to fight it. If her Willpower is high enough, the counter won't increment. Don't lower the counter overnight though, just freeze it, otherwise it'll take too long to get to the scene (like Sophie).
I'm not good enough to code this, just to theorize how it could be done. But give it to
@Baal7734 , maybe he'll like it.
PS During the sex-scene, put in one slide of Larson in the Hallway, wondering where those obscene sounds are coming from. After all, Nikki must be screaming at the top of her lungs...