So for context, I (M36) am in a polyamorous relationship with a trans girl (27). She has 2 other partners, a trans-man and a non-binary person. We are all friends, and have had threesomes and foursomes in the past, but not much recently. We were all hanging out together, when my gf went to make coffee in the kitchen. I followed her to keep her company.

Now, my girlfriend is an absolute slut for cock. There's not a moment that goes by when she's not thinking about me fucking her. She's pretty much entirely free-use. If I wanna fuck her, she will stop whatever she's doing to take my dick.

So as she's getting things together to make coffee she opens the fridge and squats down to look for the milk. As she's down there she looks up and gives me a look. I know what she wants, so I take my cock out and put it in her mouth. Meanwhile, her other partners are just a few metres away in the lounge room. I start getting really into it and start fucking her face and she's loving it. But then I go a bit too hard and she audibly gags on my cock. One of her partners hears it and says "Jesus, what the hell is that bad it made you gag?". My gf thinks quickly and finds some week-old leftovers and takes them out to show them that this is what made her gag. Meanwhile, I'm still in the kitchen trying to stifle my laughter while trying to put my throbbing erection back in my pants.