Introducing my stepbrother to my lesbian girlfriend for a threesome

I've always been open with my nerd stepbrother about my sexual adventures, and it turns out he's got a kinky side too. When I introduced my lesbian girlfriend to him, I had no idea it would lead to a wild threesome. At first, my boyfriend was hesitant, but my girlfriend's seductive moves soon had her all over him. Before long, they were both stripped down and getting hot and heavy. I joined in, and we were all tangled up in a steamy threesome. It was a wild ride, with my girlfriend taking charge and showing my stepbrother the ropes. The chemistry between us was off the charts, and we all left completely satisfied. It's not every day you get to introduce your girlfriend to your stepbrother for a threesome, but I'm not one to turn down a good time.