You shouldn't take her words so literally.
Personally, it seemed to me that she was just used him as a dildo. She treats him like a gullible idiot (which he is, in fact).
It's not pleasant to say, but so far it seems that the only one she realy "loves" is daddy))
There's a scene where the MC calls her size queen and when he leaves, she's thinking:
"No, damn it. It had nothing to do with size. Like he's going to believe anything I say now. Idiot!"
And of course after that she proceeds to fuck their father in the park...
My understanding, based on some of the dialogues and inner thoughts, is that the devs are trying to convince us that all the women are madly in love with the MC (even the pornstar, while she's already having a lesbian affair with his mother...), but at the same time they are all happily bangning someone else, because... That's what you do when you love someone so much...
I don't want to be a dick, but they are pretty much trying to make two different games in one, so the can get a broader audience, but they are putting the least amount of effort possible to make the story coherent...
The renders are really good, but the writing is like they are taking a 15 year old's wet dreams and throw them together in order to make a story...