First-time experience with stepsister in group sex

After a long day at work, I couldn't wait to get home and have some fun with my gorgeous stepsister. She's been teasing me for weeks, and I've been dying to take her on a wild ride. When I walked in the door, she was already stripped down and ready to go. The sight of her perfect tits and tight ass drove me wild. I wasted no time and dived right in, fucking her like a wild animal. The taste of her pussy was heavenly, and I could feel my orgasm building up inside me. But I wasn't alone. My girlfriend joined in, adding another layer of excitement to the mix. The three of us went at it, our moans echoing through the room. It was the hottest sex of my life. I hope this is just the beginning.