Girlfriend watched me get head [MFF]

This was several years ago in college. My (M22) girlfriend (F22) were drunk at a Halloween party in someone else's apartment. I was dizzy and had my eyes closed but I could hear my girlfriend talking to the host, one her friends (F21) about me. We'll call the friend Lauren.

"You can kiss him if you want." I tried to pretend I didn't hear it. Was my girlfriend directing Lauren to kiss me? Was my girlfriend a cuckqueen? It was late and there were probably only six people left at Lauren's apartment total.

I felt Lauren crawl into my lap, straddling me so I opened my eyes. She was smiling at me and I could see my girlfriend behind her watching. I couldn't read GF's face but suddenly Lauren grabbed my face and kissed me deep. I admit it was hot, as was this cute brunette sitting on my lap. She was slim, way more petite than my GF (who had trouble getting her ass into jeans). I was worried Lauren would realize my cock was coming to attention below her.

"Is that all?" My GF asked from the adjacent couch. She had one eyebrow up. I couldn't tell if this was a trap of an invitation. Lauren blushed and said "that's only my second kiss ever."I decided I wasn't in immediate danger and grabbed behind the head and kissed her. "There, your third kiss."

My GF stood up and reached for me. I initially thought she was going to drag me away but instead she moved my hand over Lauren's breast. It was smaller than I had ever felt, but firm. At this point I don't know whether to squeeze or run. "Do you want him to feel your tits?" Lauren closed her eyes and whispered "yes I do." She arched her back as I moved my second hand to position and squeezed. I thought I could feel her nipples.

"Alright enough with the free show, come with me." My girlfriend was walking to Lauren's room. I realized a few of the remaining party goers were staring. As we entered Lauren's room my mind raced. Is this a threesome? Was Lauren going to watch me and my girlfriend? Through the thing walls I could hear Lauren's roommate getting absolutely pounded nearby.

I leaned against Lauren's bed as my girlfriend took a seat at Lauren's desk. Lauren looked at us sheepishly. Her Halloween costume was Jess from new girl. "Would you like to learn some things Lauren?" My girlfriend was directing the show from her throne. Lauren nodded quickly. My girlfriend reached over to Lauren and removed her fake glasses before pulling Lauren's shirt off. Lauren was fully blushing at this point. "OP, your turn," my girlfriend said. I quickly obliged and took off my shirt. As if in a trance, Lauren began to feel my chest so I began to feel hers, her flowery push up bra and toned stomach.

I was all in. I decided I was going to go as far as allowed. I kissed Lauren deep and found it returned. Our hands started to go everywhere. I could hear my girlfriend's breath quickening. I stopped and looked my girlfriend dead in the eyes as I slowly pulled down Lauren's jeans. We climbed on the bed, Lauren in nothing but panties grinded on top of me while we continued to make out. I felt her petite tits and her firm ass.

My girlfriend stood up and looked at Lauren. "Are you ready to get on your knees?" Lauren dutifully slid off the bed and got on her knees, looking up at us. It was my turn to take off my jeans. My cock sprang to attention, tender from the grinding. Lauren looked wide eyed, probably the first cock she had seen in person. I moved just in reach, and my girlfriend grabbed a fistful of Lauren's hair and guided her to my cock. I had to focus hard not to cum right away - wait was I even allowed to cum in her mouth?

My girlfriend continued, slowly and gently, guiding Lauren's head deeper and deeper down my shaft. After a minute, my girlfriend paused and looked at me. I gave her a deep kiss, with Lauren's lips still wrapped around my cock. My girlfriend nodded and sat down again. She had a perfect view of us. She undid her jean button and slipped her finger between her legs.

I took over the show. One hand on Lauren's head and one hand on her tit, I made her go deeper and faster. I accidentally gagged her a few times. I didn't know where to look, at my girlfriend masturbating or at Lauren's rhythmic blowjob. It might shock you to learn I didn't last terribly long - I decided a mouth full of cum might be a lot for your first blowjob so I pulled Lauren's hair back and made her look at me while I came all over her chest. She smiled at me while trying to catch her breath.

My girlfriend got up and kissed Lauren, shocking me once again. She glanced at Lauren's cum soaked tits and said "Good girl, go ahead and rinse off." Lauren obliged and dipped into her shower, attached to the room.

Let me know if you guys want the part 2!