My Best Friend Seduced Me and I Loved it

I was awakened with a hand slowly moving down my boxer shorts, so I just pretended that I was sleeping. We both had girlfriends and had never discussed any sexual relationship with each other (or gay sex in general).
I had an immediate hard-on and I could no longer play as if I were sleeping, I was too horny and I had to explore this new and exciting encounter.
I did not know what to do, so, I just let him have his way with me. It went on for 3 or 4 hours, mostly caressing and a some kissing, nothing too hardcore. However, the next weekend, the same thing happened and we slowly progressed into bigger and better things, so to speak.
That was ten years ago, and even though we are both married these days, we hook-up at least once a week and often go on vacations for the weekend leaving our wives at home. Its just our little secret…