OK, this thread is very timely, though lacking a bit in information. But it really hits home with us.
We are evangelical christians, very involved in our church. We've been married 18 years now, and I have struggled with what I now recognize as a poly-nature, trying to be "good and proper". We have had some very hard conversations about this, and she has even agreed to opening the marriage up. Having found a beautiful and wonderful woman who is also crazy about me, I would really love to bring our families together (though she is far away at present). The wife is really struggling with resolving this idea with her faith, though, and feels as if she's not being Christian by being open in this manner.
Anyone willing to share how they have resolved this issue, I would LOVE to hear from you!