The next few days were relaxed as we all glowed in the aftermath of our drunken and very sexual night after exams. We had definitely blown off the sexual tension that had been building for the week prior, but it returned with surprising speed and intensity. Both Cassie & Tayla didn't feel the need to dress any more chaste, and their conversations were downright filthy. Cassie was jealous of Tayla having the lucky driver blow his load in her mouth and then having me blow my load in her pussy afterwards. She pouted and made audible mention of wanting that too whilst looking me in the eye and folding her arms, propping her breasts up till almost breaking free of her loose tops.
We all had to focus at least some of our attention on our final assignments for the semester. Each of us had some monster word counts to tackle as we had to read piles of notes. This saw us spending a fair amount of time outside the apartment and going to the library and study classes. It was an immense turn on to see the girls come home, often without their panties, which had become a welcome norm. They both expressed that leaving the apartment without panties was a thrill, and they often buzzed about close calls during the day. Returning home allowed them to relax any pretense of modesty, but they still chose to tease me rather than succumb to my growing ravenous libido.
While I was studying at the library I ran into Mark from my classes. We fell into easy banter as we helped each other with our assignments. As the afternoon progressed he made subtle remarks about Cassie & Tayla as he enquired to their availability and which one was my girlfriend. I honestly didn't even know what to call our relationship, and without spilling any dirty details intimated that we were 'fuck buddies'. Mark thought I meant one, and asked which one, to which my reply of 'both' raised his eyebrows high. He was well and truly jealous. The next time we met up for study he was starting to hint at 'catching up' outside of study. He was a good dude and we got on fine, and I started to think about Cassie's request. I really didn't know how it would work, but knew she had a good imagination, so invited him around that evening.
That night, Cassie, Tayla and I were wrapping up some further study over pizza. We had all been sitting on the floor with both girls sitting cross legged and pantyless. Cassie had on a skimpy crop top with thin straps. She was showing some nice cleavage and side boob. She also was wearing a slightly flared denim skirt that was obscenely short and with her legs crossed her shaved pussy was on full display. Tayla was wearing a crop top too, that had a modest crew neck, but was so short even slightly raising her arms brought her underboob into view. When she reached for anything, it rode up high enough to bring her pert breasts into view. She wore a pair of extremely loose cotton shorts, that easily flared around her legs, and with her sitting cross legged also had her pussy on easy display.
The knock at the door had them both surprised. As I stood up to get the door, they made for the sofa and armchairs to sit in a more chaste and modest manner. They enquired as to who it might be, to which I said it was my friend Mark. They both said he was cute in unison, chuckled and then bit their lips. I showed Mark in and told him to grab a seat and get comfortable. Cassie and Tayla both got up and went to the kitchen to make some snacks while Mark and I turned on the TV and started to browse the movie options on offer. Mark was a little nervous and acted like he was meeting his girlfriends parent for the first time. He was well mannered and polite, and engaged us all in conversation.
The girls were nervous too, as they hadn't been prepared for company and they certainly had no idea how to flirt with someone they barely knew, and kept their 'charms' as demure as they could manage. Nevertheless, they were dressed very sexily. Cassie's breasts always threatened to escape her top, with the crop top working its way dangerously low, exposing her areola briefly before she rearranged her top for it to repeat again within minutes. Tayla would instinctively reach for snacks and her drink without thinking, and her underboob was a constant presence, with her nipple guest starring every now and then. Both kept their legs tightly together. Mark was witnessing everything that was on offer, but being a gentleman.
On an occasion when both girls had gone to refresh the drinks, Mark asked forthrightly whether either of them was taken, or for whatever reason off limits, he was adamant that he didn't want to offend or step on any toes. I liked that about him, he was nice and I knew he would be good with either one of them. I assured him that they were their own bosses and that ultimately if he respected their wishes that he was good. He nodded, and proceeded to get nervous again when they returned. I didn't know if tonight there would be any action, so I just relaxed, took the single armchair, and focussed on the movie.
Leaving Mark on the sofa with the two girls on either side of him was entertaining as they all showed their best manners whilst the girls tried to be modest with their actions, unsure of themselves. I could see Mark try and subtly shift his growing hard on, as the glimpses of flesh continued. Everybody settled on watching the movie as a compromise. As everyone became engrossed in the movie, Tayla without thinking, put her arm up onto the back of the sofa as she casually reclined. This brought her crop top up over her nipples, but she didn't notice. Mark noticed. He was having a difficult time trying to watch the film, but his eyes kept looking in her direction. To make matters worse, she brought her knee up onto the sofa to increase her comfort, and I could see from the armchair I was sitting on that her smooth pussy came into view.
