Twitch (my husband) and I had some interesting conversations this weekend about this. He amazes me. He didn't shut down the idea and we had some interesting dialog. Overall, I think with some ground rules and open communication it seems like something we could do if things develop in this direction.
On the flip side of the coin Twitch asked me if I'd be okay with him finding another submissive to develop a serious relationship with. I'm not totally comfortable with that, so it definitely shows me what I am asking of him. We have a lot to think about.