Memorable 3some

Note : This story is completely fictional!

I've been going out with my girlfriend Julie for 2 years now and she has become very good friends with my sister Alana who is the same age. My girlfriend and my sister are 19 years old and I'm 21. My sister likes to pass time with Julie and vice versa.

Anyway, every friday night I have hockey games with my friends and last week my girlfriend told me that she had a girl party with my sister and other friends at our house. I had no problem with it so I said no problem. Around 5:30 p.m. my best friend comes to get me and at the same time the other girls start arriving, pretty cute girls I have to say. I arrive at my hockey practice at 6:15 p.m and the coach announces that his wife is really sick and that he needed to go to the hospital so the practice was cancelled. With nothing much to do, my friends and I decide to go to the nearest bar and take a beer before going back home.

We leave the bar around 10 p.m and my friend drops me home and he leaves. When i arrive, the light in my sister's room is open so I take a peak and I see that all the other girls are gone. My sister and my girlfriend are left alone. So I'm outside about to get in when I see my sister Alana kiss Julie. Now I don't know what to think, am I frustrated or turned on? Being the curious guy I am, I stick around. Suddenly Alana grabs Julies breast and rubs them and my girlfriend doesn't do anything. Alana is actually very cute and to see her with my girlfriend like that kind of turns me on. Julie takes Alana's vest off and her shirt off and starts licking my sister's body. Alana rips Julie's shirt and bra and rubs her tits and licks them. Both girls take their pants off and Julie rips Alana's panties apart and sticks two of her fingers in my sis's wet pussy. Alana's face tells the story, she loves it. My girlfriend starts licking Alana's cunt and swallows all the juice coming out of Alana's pussy. Mu sister enters her whole fist in Juli'e pussy and starts fisting her. My cock is fucking huge at this point and I'm freezing outside so I tell myself "get in and make noise so they know you are here".

I get in and after a while neither Alana or Julie come to see me.
I go to my sister's room and open the door a little bit. They were still going at it, licking each other. I began masturbating in the doorway when all of a sudden I hit the door with my hand. Both girls look at me with my pants down and my cock in my hand. My sister Alana walked up to me and told me that I turned her on and that everytime she went to bed she dreamed about me fucking her. She then took my hand and pushed me on the bed and both of them began sucking my cock. it was the best feeling ever. My sister sat over me and she began fucking me while she licked Julie's cunt. I then took control of the situation pushing both girls down and sticking my fist in my girlfriend and two fingers in my sister. I fucked both their pussy's for hours. When the time came, I cummed all over Alana's tits and pussy and I forced Julie to lick every bit of it(not that she minded anyway).

Since that night, we can,t stop having sex together, me and sis, sis and my girlfriend, me and Julie and of course all three together.