the night I put on a show for my roommate (MFF)

My roommate Erin is a cute little lesbian. She's like 5'2", blonde, nice b tits and a fat ass. She constantly drives me crazy by walking around the house in her underwear. We have a good friendship though, and we talk about sex a lot. She mentioned one time that she has a fantasy for watching a straight couple fuck. Yup. Onward.

Last friday I brought this girl Tricia home from the bar. Thin, wavy brown hair, big, round breasts, and a small ass but she's a stunner otherwise so whatever. It's clear that Tricia wants to get down when we get to my house.
We start making out in the living room, with Tricia straddling me on the couch. I'm running my hands all over her, feeling here perfect tits over her shirt, teasing her by running my hand up her thigh just until I reach her underwear and then pulling back.
I can hear Erin upstairs walking around. Tricia and I aren't exactly keeping it quiet, so I'm sure Erin knows what's up.
Tricia is into it, so she's takes off her shirt and I help her free the titties from her bra. When I take her nipple into my mouth she lets out a loud moan. I go to town sucking on her nipples while grabbing her ass. I'm hard as fuck and she's grinding down on to me.
I start kissing Tricia's neck while taking off my shirt, and I see behind Tricia that Erin is coming down the stairs. Per usual she's just in her lacy black underwear. She has a devilish look in her eye, and I know exactly what she's thinking. Tonight she's going to watch me fuck Tricia. I motion for her to sit on a chair that's facing us.
Tricia notices that Erin is there and is kinda weirded out for a second. I figure this is my one shot so I should just go for it, and I whisper something along the lines of "My roommate just wants to watch". Then Tricia did the sexiest thing ever. She bit her lip, looked at Erin, looked back at me and said "hot". I would have cum in my pants right there, except Tricia hopped off of me and started pulling them off.
My cock springs out and Tricia immediately wraps her lips around it. This girl is GREAT and sucking cock. She takes the whole thing, and is really using her tongue. With Tricia on her knees in front of me, I have a great view of Erin. She is enjoying herself, rubbing her pussy under her panties with one hand and groping her breasts with the other.
Tricia is doing too good of a job and I want this to go on forever, so I tell her it's her turn. I pull off her skirt and underwear and dive my face into her sweet shaven pussy. I run my tongue up and down her slit a few times before i go to town on her clit. She was soaking wet before I even started and she kept on gushing. She squealed as I put a finger in her while tonguing her clit. I searched for her g-spot with my finger, she moaned louder and louder, and I felt her tense up, shake, and relax. Yes. Orgasm 1.
As I emerge from the depths of her pussy, I look up and see Erin is really having a good time. She's completely naked now, going to town on herself. She's got a few fingers in her pussy and she's rubbing her clit furiously with her other hand.
I don't want to stop the show for her, so I lay Tricia back on the couch and slide my cock into her soaking pussy. FUCK she is tight, but she's so wet I sink all the way into her. She moans and moans as I bottom out inside her. Man this girl is a loud one. I hear Erin breathing heavy and wimpering behind me and I know she's cumming. I look back and she's shaking but still going strong, rubbing her clit fast and watching us intently.
Tricia is being loud as fuck still, and I see that's she's now watching the show Erin is putting on.
I keep pounding away at Tricia, rubbing her clit and enjoying every second of her tight pussy.
Tricia stops me and switches positions, getting on all fours on the couch. She looks at me over her shoulder and does this sexy little ass wiggle I will never forget. I take the hint and starting fucking her pussy from behind. Now, I mentioned she's tight, but goddamn from behind she was even tighter. I am a sucker for doggy so I know I'm not going to last long. But Tricia is rubbing her clit like a maniac and watching Erin intently, so I know she's about to cum again too.
I feel Tricia getting close and I'm just about there too. I lean down to get a fistfull of Tricia's tits and also to inform her that I want to cum all over them. She is happy to oblige, she says. Of course I want her to get off first, so I take over the clit rubbing for her. As soon as she cums I feel my own orgasm coming on, so I command her to her knees in front of me. Erin is wide-eyed and moaning, fucking herself even harder with her fingers, and I shoot a huge load on Tricia's tits. Erin starts cumming hard, again, and after we all sit around in awe.

Hope that was written alright!

Source: reddit.com/r/gonewildstories/comments/3h44y8/the_night_i_put_on_a_show_for_my_roommate_mff