You are right, homosexual relations and acts are not part of God’s plan. We cannot affirm what God does not affirm. Homosexual attraction is a disorder, a defect in sexual orientation. If it is innate, the person is not to be blamed. They need to be loved and supported with compassion and with the truth.
So I encourage you to keep praying and making reparation for your son, that the Lord may grant the necessary graces to free him from the falsehood of the homosexual lifestyle.
Read up on Kimberly Zember’s testimony (overcomemin.com) and some of my other answers on this topic
http://askfrfrancis.org/tag/homosexuality-en


