I suppose this is possible.
There are other moments like this, though, that I strongly felt were stupidly unrealistic. If you don't mind a minor spoiler, here's one...
[The girl in question ends up escaping, and when she gets home she's not traumatized by the event at all, simply because he didn't have a chance to rape her. She was kidnapped, beaten and received severe head trauma, he belittled her and made her pretend she was someone else to fulfill his fantasies, but she even says that it wasn't a big deal because "he didn't get a chance to rape her".
]
I think being kidnapped and beaten would be, in itself, quite traumatic.