So a little bit of information, my gf and I have already had a threesome with this friend of mine. Just did not expect to see it go outside of that arrangement.

So I can say that I have always been turned on with my gf getting fucked by guys she is attracted to. I enjoy watching it and encouraging them while they are fucking. Now I have a camera system on the outside of our house, I got suspicious the other day when I couldn't get ahold of her. I just checked the cameras and noticed she had my friend outside looking at her car for some repairs he said she would need. Of course I know he has a shop and I don't understand why he's at my house doing the work. I decided to just surprise them and see what was going on. I left work and I live close by, I walked up to my house and he is not working on the car anymore. I started wondering, then I walked up and looked in the window of the living room.. my heart drops and my eyes won't look away. I am watching my gf on her knees sucking my friends big cock. She usually doesn't ever want to do that but she was going pretty deep into her throat while he waited for his cock to get hard. I could feel my dick in my pants get hard, even though I was upset. I couldn't believe this, I decided to sneak in the house and watch it. I got inside and now my gf was bent over the couch and he was pushing his cock in her tight pussy as she moaned. He worked himself in balls deep. I pulled out my dick and stroked while he fucked her into an orgasm. I was so excited, he made her lay down and pushed her legs open so he could get his big cock back in her wet little pussy. It stretched around his thick cock, she was asking for him to fuck her harder. He was going steady which made her cum again. She pulled her legs back for him to get as deep as possible. The sound of his body smacking hers was loud throughout the house. It was obvious he needed a break, so she climbed up and slid his cock inside herself. I was shocked that my gf could ride a cock this perfectly, she told me later that it was because he was bigger and had more to work with. As I watched him grab her waist and hold her down while fucking her extremely deep and fast she screams out and cums a 3rd time. I can't hold back my load much longer, then I watch him put her back down and spread her legs, he slams his cock in her pussy. He tells her that she is going to take his load, she knows it is a bad idea but begs for his seed. He starts grunting and I watch him pulse in her pussy. I blow my load on the floor, as he pulls his cock out I can see his load start coming out of her.. I decided to walk in and they both jump. After all, my gf got me to clean the load out of her.

She is now honest with me every time she has a friend come fuck.