Lisa is a little nuts, like every other member of the family and a lot of her behaviour comes from the fact that she doesn´t have experience with sex and relationships. But the most irritating aspect of hers is that "getting off when feeling helpless"- trait seems rather strange to me.
Lets talk about this family:
Mom: Submissive who tries to pose as a conservative mother but, in reality, is a whore.
Elder Sister: Delinquent and lazy who, as much as she tries to deny, is addicted to her brother's dick.
Younger Sister: Fickle personality who just wants to experiment new things but still be a "pure and innocent" girl.
Aunt: Manipulative nymphomaniac who uses sex to persuade her nephew (as if it was even necessary). I'll not even use the fact that she drugged her sister so she would accept letting her kids fuck each other in a movie.
Eric: Jerk cunt (not even part of the family, but there you go)
And finaly we have the protagonist, that
deceiving,
traitorous,
blackmailing piece of
shit who just wants to put his dick inside
everything that moves.
PS: Don't get me wrong, I like this game, I'm just poking fun at it.