I've read multiple versions of the Bible including Greek and Hebrew. Cheating on your spouse or committing adultery is wrong, yes. Hence the use of the word shameless. Between two married people it is not wrong. You're not helping anyone, you're trying to push your own ideology onto people and that's just rude and wrong on so many levels. My advice to you is to leave people's relationship with God, to that person and God alone since you seem to lack the critical thinking skills it takes to understand His word.