Is it a sin for a person long divorced to remarry? I'm just curious. My friend says it is adultery to remarry after divorce even if you divorced from a cheater. She also said it is sinful for a divorced couple to remarry. I think she is only going off of the Old Testament and is legalistic.
Questions like this are best answered by parish pastors who know more details of the individuals involved than I do.
What I can say in a general way is that a Christian whose marriage was broken by the unfaithfulness of the other spouse, and divorce took place, is not forbidden to remarry.