Bobby Knight had the right idea for Sam
Just lay there and enjoy it. She really didn't have much of a chance to stop the Poltergeist and he wasn't doing anything bad, except giving her sweet love on a regular basis.
It wasn't to she whined, complained and Thomas's annoying camera that it started getting nasty and violent. It would have gotten bored with Sam eventually and moved on.
Sam is the most to blame much like Knight's example about women getting raped. The more they complain, the harder it is.