Part 1: In college I shared a house with a group of friends.  I had a casual sexual relationship with one of my female house mates. Friends w/benefits essentially.  Most of the other roommates were aware of our situation so luckily there was no sneaking around needed.  Most of us actually had at least one or two encounters with each other over the years.  It was surprising how well everyone got along considering.  One night in particular myself and, well lets call her Sarah (have to protect the innocent, you know), were hanging out along with one of our male house mates…lets call him Jake.  Sarah and I were both very sexual and had no qualms about flirting or fooling around in front of other people, especially in our own place. Our room mates were used to it.  Fairly deep into our second bottle of wine, Sarah and I were flirting pretty heavily, with her on my lap and kissing a bit. Jake was still on the couch next to us. Jake made a sarcastic comment about not letting his presence stop us from doing anything.  As if issued a challenge, Sarah slid down to the floor onto her knees between my legs. She placed her hands on my thighs, slid them up to my waist and pushed up my shirt. She started to kiss my chest, and stomach.  She must have read my mind because she then started to unbutton my pants.  She paused, turned, and asked Jake if this was okay.  He of course said yes. Once she grabbed my pants and slid them down and off of me, I think we both sort of forgot Jake was there.  She placed her hands back on my thighs and started off sucking and licking my balls. I asked her to take her shirt off (no bra for her little tits!).  She obliged.  She leaned forward again and ran her tongue up my shaft to the head and took it into her mouth.  I was a little surprised that it had gone this far with Jake sitting right there but not enough to stop her.  She started to give me head and I just leaned back and enjoyed it.  I really couldn’t give a shit who was in the room at that point.  After a few moments I lifted my head and watched her.  She gave some of the best head I had ever had up to that point.  They say the best skill to have while giving head is enthusiasm, and she was spot on.  The chair I was sitting on and the couch Jake was on were close enough that Sarah was partially leaning against Jake’s legs.  I sort of nodded to Jake to grab her ass.  He leaned forward and gently placed his hand on her ass.  When he did, she slowly tipped her head to the side and gave Jake an inviting look.  He asked if it was okay.  She said ‘Sure’ and went back to giving me head.  Watching him grab and gently squeeze her ass really turned me on.  He slid his fingers under the waist band of her shorts and pushed his hand down the back of her ass.  Her shorts were partially pushed off and as soon as his fingers reached her pussy I could see it on her face.  My cock still in her mouth, she let out a soft moan.  She looked up at me and coyly asked, “Do you mind”. It was so fucking hot I couldn’t have cared less. He started to finger her a little more aggressively, enough so that she had to pull off my cock. At that point, we seemed to be past the subtleties.  She stood up and pulled her shorts off the rest of the way.  She turned around so her ass was facing me and lowered herself onto my cock and slowly started to fuck it.  I really couldn’t believe things had gone this far but everyone seemed to be into it and I wasn’t about to say anything.  Jake took the initiative and took his pants off, which exposed his already hard cock, with the hopes that Sarah would be interested.  He was right.  She grabbed him by his hard on, pulled him over and started to suck it as good as she could while still on me.  After a few moments it was apparent that this position was a little awkward.  She got off me, gently pushed Jake back onto the couch and straddled him.  Watching her reach behind her, guide his cock into her and start to ride him, I got the impression she had been wanting to do it for some time.  I don’t think Jake new what to think.  She was so hot in that moment.