The part that makes him a POS is having sex with her with false reassurance, then breaking up with her. That’s him feeling justified for revenge. If he learned the truth and broke up with her then that would be normal behavior instead of using sex to dominate, hurt, and get back at someone.
So you consider yourself to be Christian but you’re also considering marrying somebody who is into witchcraft?
The part that makes him a POS is having sex with her with false reassurance, then breaking up with her. That’s him feeling justified for revenge. If he learned the truth and broke up with her then that would be normal behavior instead of using sex to dominate, hurt, and get back at someone.