She has a boyfriend and she sucks another guy
It is one thing to have someone who loves you and quite another to be faithful. One thing has nothing to do with the other. They even seem incompatible at this point in the story. You can say, without anyone being shocked, that it is okay for a woman to do what she wants. And obviously, what this young girl wants is to do dirty things. Because she has a boyfriend, but she sucks another guy. That it’s not his fault. He just lets the blonde give him a cock suck and then takes her to a hotel so he can enjoy her pussy with great enthusiasm. As he should do because it is his duty.