In my very "limited" experience, I believe a Dom/Master can love their sub/slave and not compromise the relationship. However, it did appear that my former Dom became more of a "Daddy Dom" when I was dealing with certain issues. It was almost like he was afraid that I would "break" if the play was too intense, whereas I craved that "intensity" to help get my mind off the issues.
I have spoken with a few submissives who are married to their Doms and they said there is a difference. For example...if they didn't complete certain tasks, etc., they weren't reprimanded.