Best sex I ever had by far was outside of marriage. I know I shouldn't have done it, I know it was cheating and it hurt others... but DAMN the sex was good. I think it was BECAUSE we were already very good friends that it worked so well for us. We had been so close for so long that we communicated extremely well and both of us felt the whole thing was about how to make the other feel good. When two people can get together like that - WOW. If you can take that friendship and subtract the cheating guilt, I think you may really have something going. Knock yourself out and have fun.