3some with wife

How do other women feel about having a threesome with there husband and another women?? I’m a little curious
Ya I’m a little nervous too. But the rule is we only go as far as I want to. Especially for the first time, my husband only gets to do what I allow him to do with her. And that’s fine with him. He’d be happy just to watch me with another woman lol. If he gets to join in even a little that’s a bonus. But in the moment maybe I won’t mind that at all. Maybe I’ll really enjoy watching him join in? Will only know once we start I guess.