As we sat in Starbucks, my girlfriend's sister told me to screw my girl and that she was gonna watch

My girlfriend and I had been a party that night and her sister had tagged along for a lack of anything better to do. All of us had a decent amount to drink that night and decided to grab a cup of joe at the Starbucks before heading home. My girl was looking really good that night, tight little skirt, revealing shirt, let’s just say that I couldn’t wait to get home and get to business. What her sister was wearing wasn’t helping much either, short little skirt, very tight tank top, no bra. She admitted that night that she wanted to get laid, but managed to strike out (hey even horny girls can be picky).

My girl grabbed a seat in one of the comfy chairs and as I was standing in front of her, she decided to spread her legs and give me a full view of what was underneath, or I shall say, lack thereof ... no panties. I was speechless, and instantly visibly rock hard. Her sister looks down, sees the tent and says, “You are going to fuck her right now and I’m going to watch!” I look at her, I look at my girl. She mouths to me “fuck me now!” You didn’t have to tell me twice. I looked around, the place was empty, dropped the drinks, grabbed both of them and pushed them into restroom.

I lifted my girl up onto the sink, hiked her skirt up, dropped my pants and was thrusting into her in no time. Her sister sat down on the toilet, hiked up her skirt and started to rub her crotch while she watched. I was watching her the entire time. She mouthed to me “harder” and I started thrusting harder, my girl moaned, and her sister moaned, too. I was doing everything I could not to lose my load right there. Then her sister lifted up her tank top so that I could get a view of her tits and was squeezing her nipples as she was rubbing her crotch. Their collective moaning was getting really loud by that point. I knew the people in the store could hear us, I didn’t care. I could see now that she was very visually wet. I turned and lifted my girl’s leg so that she could see me penetrating. She pulled her panties to the side and inserted a finger between her lips. She let out a real long groan, my girl groaned, I was ready to let go, but was holding on with everything I could.

I had to do something to get her to take her panties off before I finished. I somehow got my girl to lean back on the sink, threw both of her legs over my shoulders, and angled myself so her sister could see the full penetration. She got this devilish look on her face, hooked her thumbs under the elastic band of her panties and pulled them to her ankles. This position was very uncomfortable, but that right there made it all worth while. My girl was moaning like crazy, her breathing was deep and short, her sister had one finger in and inserting another. She was moaning away, and I could tell she was getting close.

Someone started banging on the door, “I know what’s going on in there, I’m gonna call the cops!” That didn’t slow either of them down. My girl started to cum, and I mean CUM. I look at her sister, she now has three fingers in and is pumping away with her hand. Her hands are shaking, her legs are shaking. She looks at me, and mouths to me “Cum, Cum, Cum!” That was all it was going to take, I made the decision right there that I wanted her to see me lose my load, I pull out and let loose. I’m spraying it everywhere, my eyes are closed, I hear her come, and come hard, there’s still banging on the door, she keeps going and going. She finally finishes, out of breath, and soaked in sweat, so much so that her tank top was now see-through. I look at my girl, she is covered in cum, her snatch, her shirt, her face, and she’s just lying there trying to catch her breath, too.

The banging continues on the door, I say “we better go.” We clean up quickly, rearrange our clothes, and open the door. The manager is there, and he’s pissed. We try to walk past him, but he’s not letting us. Her sister walks up to him, opens her purse, pulls out her soaked panties and places them in his hand. He looks at them, looks at her and she whispers in his year “These are for you, they’re wet with my juices, and let’s keep this whole thing quiet.” He has a dumbfounded look on his face. She whispers in his ear “pretend you’re fucking me,” strokes his crotch a few times and then kisses him on the cheek. We walk past him, and we’re barely out of the room and the door is closed. We walk back out into the main area of the store, grab our drinks and head for the door. There are a few guys sitting in the corner, one of them gives me the thumbs-up sign. I put my arms around both of the girls, my girl with cum on her shirt and some dripping down her legs, her sister with her sweat soaked, see-through tank top.

What a night!