Again, Mormon's say adultery is sin.
That is a truth of the Bible.
Do you disagree?
If you are in agreement with the Bible. You are in agreement with a Mormon.
This is a discussion forum. A forum for ideas. A forum for philosophies.
Agreeing with someone who makes a valid point is not "fellowship."
And if that's the Calvinist idea of "fellowship" then there's another reason I can't agree with you.