The reason I asked was because it was put to me that that type of attitude would be insulting to the husband. Having no frame of reference from personal experience because the guy that dated my wife was married. However his wife did not date other people. Never had any conversations with her so I don't know if that was her choice or his. But now I will have to inquire just out of curiosity.
As for sharing ... I do know entering as a secondary has a completely different mindset attached ...right or wrong it different.