What you said makes sense. Characters are people, and people are not the same. I know a couple who started off as a one night stand, and have been together for twenty years. I know another couple that held off for years, and then broke up after having sex. My cousin and his wife rarely argue over anything, and all my neighbors do is argue.
I need to think in terms of what is right for the characters, and not worry about what anyone else has to say.
Thank you.