I had some conflicting feelings with this scene...
It felt a bit like an exorcism, trying to make Jane acknowledge her kink, putting her trust in the MC, replacing her father figure...
I think what really gets me with this game, is the fact that I hate the MC's ways of doing things, all the while I can't deny the results could be good for the girls in the end... it's really a different protagonist that what we're used to see in other games.
It's a corruption game without a cheat magic MC. That is definitely different.
The main tentpole of this game is the MC's single-minded quest to get back the shameless nymphomaniac who groomed and took advantage of him as a kid. He doesn't recoil at Jane's circumstances, because that's blasé to him.
Yeah, yeah, someone with power over you took advantage, but how are you going to deal with it now? Hate what it made you and be miserable, or accept yourself and live the best way you can? What if that best way meant being my obedient little sex pet? Maybe I'm guiding you this way because I love you, or it's just because I can.
Your childhood's effect on the adult you become is a recurring theme throughout and informs every character. You're playing a deeply flawed person who lost sight of normal a long time ago but is also brilliant and skilled at analyzing people. Just look at how unprepared he is when his own real emotions assert themselves over his careful self-control.
If you're happy something happened because it's really sexy and you like the character a lot, but you still feel kinda guilty about it, that's the game doing what it's supposed to do.
So yes, please give me the option to forsake all other bitches and get deeply depraved with Jane...then marry her.