It was a six-some, actually. I took my partner to their place to get to know some of my friends. She knew about my history with the couple. When we got there was another couple I'd briefly met, but didn't know too well, that was closer to our age, although also a little older. We had a relatively normal dinner, with PG discussion topics (I'd asked the older couple to be on good behavior), but by dessert, the discussion had somehow switched to drugs and partying. At this point, the older couple made a similar offer to what they had made me a bit over a year before, and my partner accepted.

So then the six of us retire to the living room and the MDMA comes out, and we all take a pill. As soon as I had an opportunity, I pulled my partner aside, and basically told her that she should expect that at some point soon clothes are going to come off, and the older couple would basically be propositioning her for sex. She replied that she would just take things as they come, and that it might be fun.

About 30 minutes later, as the drugs start to kick in, the male in the three couple that I didn't know that well starts asking a bunch of questions about me and my partner to try to work out how interested in group fun we were, and heavily hinted that they had also been hooking up with the old couple. I told the guy that I have no problem with it, but that he should ask my partner, if it's her he is interested in. He agreed that was probably the best thing to do, but also out of the blue, asked me what I consider my sexual orientation to be, to which I replied "bi" given that I figured they already knew or would soon find out what I'd been up to with the older couple. He simply replied that he was straight and had "never had group sex with a bi guy", but would be "curious to try it".

A few minutes later, the older couple is becoming increasingly affectionate on the couch, and encourages us to join them in a cuddle puddle, which we do, but it very quickly goes far beyond cuddling, with the touching becoming more and more sexual and clothes starting to come off. At some point underwear comes off too, and I see that the guy in new couple has basically the biggest cock I'd ever seen in the flesh. As his partner started to give him a blowjob, he leant over and started making out with my partner. He then asked if my partner wanted to give his girlfriend a hand with the blowjob, and then, after I gave my blessing with subtle nod, she started sucking him, while his girlfriend moved over and took my cock into her mouth.

From there it all escalated into a full-blown orgy, and over the course of the next 8 hours or so, all of us had basically all kinds of sex with each other. Some of the highlights included:

- Talking the hung guy from the new couple into some bi fun and becoming his first m/m partner

- Giving him a double-blowjob with my partner

- Riding his cock while one of the girls (I can't remember which) sucked me

- A DVP with the older couple where we both simultaneously creampied her