They could move to a thumb drive (USB), but they won’t.

I dont see why not. He would be young, perhaps naive and inexperienced; in other words, he would seem to be a “safe” choice. Realistically, he too would probably end up being abusive, a disturbing and unfortunate reality that the abused often unwittingly continue the cycle. It’s extremely difficult to recognize and break. This type of story could be very dark and sad.