[MMF] Rubbing cocks with a friend

So this happened fairly recently with a friend of mine [D] and his girlfriend [S]

D and I have had some fun together in the past. He’s dark haired, fairly tall, slim with abs and a nice cock that’s around 7” big and pretty thick. S has brown hair, is short (around 5ft 2) tanned and very curvy, with DDs and quite a big ass. They looked good together I have to say.

I get a text from D one day explaining to me how S thought it was so hot that we’ve done stuff together, and that she wanted me to come round for some “fun” later that day. I text back saying that I’d love to, and instantly my mind starts to wander.

I arrive later that day and knock on the door to be greeted by D in just his underwear. It’s clear to see that his cock is at least semi hard. He gives me a hug and welcomes me in. As we’re walking down the hall I give his ass a slap, which he loves.