I am not sure what just happened here but The Commandments says something against adultery, right? So the first bolded statement is true, right? Because regardless of gay or straight, if you have sex outside of marriage, that is adultery, right? So I am not sure why you would be shocked and saddened, but hey to each his own.
And in response to the 2nd bolded item. Since you quoted Leviticus. Chapter 18 and 20 has passages against it. So again, not sure why the sadness, but the sun will come up tomorrow.
I will admit I was off on the BELIEF of sin on divorce. but in my defense, I said I wasn't sure where it was written.