With us the dynamics was the other way around.
We started to swinging and swap with friendly couples, but just at first. Because to do so is more complicated than MFM (yes, I know it is kind counter-intuitive, but it is easier to bring just another man or woman to your relationship than bringing an entire couple).
Many wives got very concerned when their husband is exposed to flirting and fucking other women, despite the fact they even get more attention from other male or males. See, a hotwife lifestyle doesn't mean the couple care less for the continuity of the relationship. A liberated wife still wants to be your wife in the end of the day.
Our impression is, if your wife isn't bissexual so she would probably prefer to be shared with other men. And she might see other women as a bad distraction and that wouldn't be fun at all.