So, why not have hubby and bf-hopeful talk it out before you hang out with bf-hopeful?
My boyfriends are deep friends, First bf knew Current bf before Current bf knew me. They became friends first. Before I was added to the friendship. When we came to this poly crossroad, I talked it out with Current bf, and he assured me (a few hundred times) that he really was okay with it. I said, would you call First bf and tell him that? (I don't think he ever did, but I don't know, and I wouldn't know, because they don't talk to me about their friendship. much.)
Anyway, you have permission. Ask him to give permission to the guy.
Love is that condition in which the happiness of another person is essential to your own...
Robert A. Heinlein
Me: female, bi, (formerly hinge of a vee)
with FirstBoyFriend (FBF)(moderately long-distance)
and no longer with CurrentBoyFriend (CBF)(who lives in the apartment building next door)