never mind what Steve feels about it.

Well, assuming the writer has thought it through, Steve has been having sex with Sharon while she's brainwashed into wanting it - ie he's been a party to her rape. I think we can all agree Steve is without blame, as he had no idea, but he's going to feel completely horrified and guilty.

I really don't see how Steve and Sharon as a couple can ever recover from that, although I hope they'll be friends again.