not in yaoi it's not lol
He clearly told him to stop and the beast stop but he told him to come back so they could have *~* so I wouldn’t consider that rape
he did rape him if he does something he doesn't want. he raped him afterwards when he said no, as no means no.
yes even in yaoi it is like wtf why are the authors so fucked up making stories with glorified rape and shit like that
also he was sooo close to raping him and the dad got a feeling that the beast was gonna rape someone outside and "decided to make a sacrifice out of duty" but it is still rape bc he didn't really want to. so yes in conclusion the beast is a bastard rapist.
i hate this type of story. what a dumbass dad... "my duty" STFU your duty is to clearly tell him NO and that it's UNACCEPTABLE and to break ties with him for raping you. WHY TF would you wanna STAY being his relative if he's an asshole rapist that views you as his property? Stupid af.