Well even if he did, I don't see a problem as long as they remain professional. I mean there's a lot of married actor/actresses doing bed scenes in a movie and that's reality. But if he has other thoughts like doing those things outside the camera then that's a different issue, that's not being a professional actor, ,that's cheating.
the issue is, she didn't even KNOW he was planning on being an actor and all of a sudden she finds out he has a bed scene. even if it's not real, she has every right to be upset. it's not like he's been an actor for a long time for her to get used to him doing scenes like this. feeling jealous or hurt at the beginning of his career (which she had no idea he was still interested in doing) is very valid.
guys he didn't exactly do the bed scene yet, like a lot of comments are thinking. he just got an offer to do a role with a bed scene, but he hasn't actually done it yet.