Can you please give me tips on how to increase corruption of a girl? I am stuck at 28 for michelle, and sex rarely brings at least 1 corruption point. It is crazy.
Ask her for hopes and dreams first once her affection is decently high and her willpower is still at acceptable level. Ask all uniques that. A lot of them do not have one, but the ones that do get disabled when willpower is very low or corruption is very high. It's a hassle to reverse which is why I never bothered. That and their very minor but very annoying dialogue changes.
Anyway, dungeon. I am not sure what is the threshold for this, whether their corruption is above 10 or your bondage/flagellation stat is high enough, but there comes a time where just fiddling with the buttons, entering and exiting an option like Stimulate without pressing any of the Stimulate options passively raise arousal to 8 without costing her stamina. Once it is at 7-8, one caress pussy action gets her to 9 Arousal. You pick Fuck Girl ---> Oral ---> Deepthroat once for +1 Affection and +2 Corruption (if she orgasms, which is guaranteed, unless your Copulation stat is too low or something). Cancel the oral, repeat the clicking and exiting buttons until 8 Arousal, get to 9 arousal, one deepthroat, one orgasm, cycle again. You can do this around 3 times before you yourself gets an orgasm, so one sex session is +6 Corruption total.
Very stamina heavy for the girl though, because unlike vanilla sex, her stamina does not reset back to 5 when hitting 0. The less stamina option is vanilla sex using request sex, and successfully finishing on her face for +2 Corruption (I have not checked the cap; there is no +2 Corruption notice from this but it is there unless maybe she is heavily corrupted already). I discovered this when my carefully maintained girls (33-36 Corruption) kept having random corruption increases (before midnight; also my household corruption is 6, go figure) when I was manually raising their vaginal stat to 120. Another thing I discovered during that is that finishing on her throat apparently generates 2-3 Fear if her corruption is lower than 30 but there's no notice.