In my case. I am Hindu, and my husband is Catholic (really he now says he is more of a Buddhist now There was never a problem between us, no fights over which religion the kids would follow. The kids were exposed to both paths, but they both ultimately became Hindu. I agree with the earlier post that said that the two that marry know each other and should be able to work these things out. As far as it being a sin...I don't agree...but then again it is just my opinion.

Waheguru ji ka khalsa, Waheguru ji ki fateh,
Parvatasundari