Was for him and Rebecca to get inside the bodies of two siblings and go and have a romantic sexual relationship? Anyone find that very bizarre? This is a brother and sister you're trying to get inside of and go be together in, if you ever have kids they'll have webbed feet and 1 ear and 3 noses.
sharei was thinking the same thing
shareI didn't think it was implied that he had any intention of engaging in a romantic sexual relationship with those siblings, unless I missed something.
Peter Quint took the boy because he found out that it was a way for him to get out of Bly.
Peter Quint tricked Rebecca into killing herself so that he wouldn't be struggling to figure this predicament alone.
He's a narcissist and a sociopath, and maybe he was considering being with Rebecca after, but it's also reasonably expected that he'd drop her off on a whim. By the time that the show takes place, I don't necessarily think he's thinking about any of that. In fact, he constantly hits on Dani while he's possessing the boy.
His priority is leaving Bly, not being with Rebecca.