My GF and I have had threesomes and even a gangbang but always her with multiple men but never multiple girls. I told her I loved all the sex and it was great but I wanted my fantasy of 2 women for me. Some time went by after our talk and I was coming home from a work trip. I catch an uber home since my GF said she was busy at work and couldn’t pick me up.

I get an uber and get home and I see my GFs car in the drive way so I’m confused. I thought she was at work. I walk in and there’s another girl on the couch talking to my GF. I say hi in a puzzled tone and she introduces herself. She’s blonde, pretty, wearing a top showing her midriff and a skirt, seems around our age. I go to the room to change out of my travel clothes and into house shorts and a T and when I get back my GF is in the kitchen making something and the girl is on the couch. I sit a few spaces down from her and we are chatting. She scoots closer which flusters me but we are chatting causally. She puts her hands on my thigh and I move away. I am still confused as to who she is and why she’s here. My GF didn’t explain anything to me. She drops something and as she’s picking it up she flashes her bare pussy at me and I stand up and go to the kitchen. I tell my GF what I just saw and ask who this girl is. She says it must have been by accident and it’s her friend from college and they ran into each other at the grocery store so she invited her over for a drink.

We all sit back at the couch and my GF positions myself in between them on the couch. We talk and eat some snacks and after 30 min or so my GF stands up and says she forgot her work phone in the car so she goes to get it. While she’s away this girl leans in and starts trying to kiss me which flusters me and I stand up but she pulls my hand down and seductively says “your GF isn’t here, kiss me”. I stand up but she pulls me down again and now she’s on top of me on the couch as my GF walks in. I’m mortified but my GF has a grin on her face and starts laughing. She just says “guess the party is starting”. She explains that it is her friend from college but they used to hook up and they’ve had a threesome before and she’s here to fulfill my fantasy. I’m smiling from ear to ear, I waste no time in getting her naked and proceed to watch them do everything I’ve ever imagined if I was in this situation. It’s amazing, I lean back on the couch as they take turns blowing me. My GF hops on top first and then the other girl. They take turns riding me and riding my face. It was my ultimate fantasy fulfilled. The girl leaves and my GF and I have sex again but more passionate. I tell her anything she ever wants she can have. What a rush and what an experience!