I think that scene was Seraphina choosing between fully abandoning her son as shes no hope anymore of him giving up on his infatuation with her or trying to make him realize he doesn’t love her how he thinks he does and just wants her body. Obviously in the love path, MC is going to continue to love her more than just physically so it didn’t pan out how she expected. Now she knows his answer and has to decide if she truly loves him as both a son and man.Unfortunately it costs us a lot with sexual actions, its just half-assed handjobs and just talking with her then she goes crazy and fucks us out of nowhere due to taming the beast lol