You can cry and cover the Lord's altar with tears, but the Lord will not accept your gifts. The Lord will not be pleased with the things you bring to him.
You ask, "Why are our gifts not accepted by the Lord?" Why? Because the Lord saw the bad things you did--he is a witness F14 against you. He saw you cheat on your wife. You have been married to that woman since you were young. She was your girlfriend. Then you made your vows F15 to each other--and she became your wife. {But you cheated on her}.
God wants husbands and wives to become one body and one spirit. Why? So they would have holy children. So protect that spiritual unity. Don't cheat on your wife. She has been your wife from the time you were young.