On the third night of sleeping with Marilou, she mentioned that she would be going back home the next day. I was really sad that this fun was coming to an end, although I was also looking forward to being back with Shella. Throughout the 3 days and nights that Marilou slept in my bed, my wife Shella stayed in the spare room. We didn't see much of Shella in those 3 days, but I was conscious that she was still happy with the arrangement and, each time I asked, she said she was. One time she said I had to tell her all about it when Marilou left. On the last night, me and Marilou were like 18 year olds, our appetite was insatiable. We would fuck, rest, then fuck again. Sometimes I would just finger fuck her, or use a dildo, just to give my cock and balls a chance to recover. They hadn't felt so drained for many a year. Marilou noticed that, while I liked getting my nipples sucked, stroked, pinched and, at times, bitten, when I came I would often push her hands or mouth away because the feeling was too intense. That morning, at about 7am, she took her stockings and tied me to the bed. She then fucked me, whilst sucking and nibbling at my nipples. The feeling was immense as I shot my cum into her cunt, and she continued sucking. Shella later mentioned that she heard my groans in the next room and wondered what magic her best friend was performing. We showered together, then went downstairs for breakfast. Marilou was going to be picked up by her son at about 9pm that evening. However, my plans for a day with Marilou were ruined when she mentioned that she wanted to go shopping again. Shella and Marilou left to go shopping, and I just went to bed and caught up with some sleep. I was woken when I could hear Shella and Marilou giggling as they came in through the front door. Marilou has the dirtiest laugh, whether she is laughing at a cartoon on TV, or at some lewd comment that I have made. It's a laugh that reminds you that you are going to get a lot of fun with her. I went downstairs to greet them, but they were both giggling like schoolgirls. "Just go back up to bed" Shella said. "Marilou will be up soon". I did as I was told, and remembered the treat I had when Marilou last returned from shopping. I could hear both women laughing in the spare room as I waited patiently. Soon, Shella walked in, wearing a black and red corset, black stockings held up by a suspender belt. She looked absolutely amazing. She was holding a shopping bag in front of her. Then, in came Marilou, wearing just a bra and some white stockings, She was also holding her shopping bag in front of her. "Wow" was all I could say. "And now for the reveal", Shella said. They dropped their bags, and I couldn't believe what I was seeing. Marilou was wearing a strap on, quite small, about 4-5". Shella was also wearing a strap on, about 8" long. They looked as sexy as fuck, but when they looked at each other they burst out laughing again. Both women crawled across the bed, Marilou kissed me and I felt Shella's familiar licking technique on my nipple. I wasn't sure whose hand was stroking my already erect cock, but guessed it was Marilou because she gave amazing hand jobs. Shella then ordered Marilou to take off her bra. When Marilou's were on show, Shella fondled them and saw that they were covered in love bites from me. "You have been fucking busy haven't you?" Shella said. "Now, suck my husband" Shella ordered Marilou. Marilou obliged and went down to suck my cock. "No, I want to see my husband suck you". Marilou switched position to a 69 and her strap on was now in my face. "Suck it" Shella said. Marilou started sucking my cock. "And you".... she ordered me. I took Marilou's cock in my mouth and I could feel Shella's hand stroking my leg as I came into Marilou's open and willing mouth. Marilou climbed off me, and Shella and her then kissed. Marilou got off the bed and Shella then turned me over. I felt Shella's tongue between my ass cheeks, and it felt amazing. I looked, and saw Marilou with a bottle of lube that was now being added to Shella's saliva on my ass. "Fuck my husband, bitch" Shella said. I had often watched pegging videos with Shella, and often mentioned that I wanted to experience it, but she refused every time. However, as I was to later find out, Shella had been reduced to watching porn videos whilst she could hear me making her best friend scream and groan with pleasure for 3 solid nights. I had also watched a pegging video with Marilou, and she mentioned this to Shella on the train journey to the city earlier that day. Together, they watched a pegging video in a changing room where the guy was spit roasted. It took a few goes, but eventually Marilou's small cock was being gently thrust into my anus. "You're a couple of bitches" Shella said as she moved in front of me, and put her cock in my face. "Can you take it all?" Shella asked. I tried, and gagged on her cock. Marilou's thrusting was getting harder now, or my arse was starting to feel sore. "It's my turn to fuck him" Shella said. She tried to fuck me, but it was too big. Marilou took over, and Shella licked on my dick. I don't know if it was the 3 solid days of fucking Marilou that was the cause of me not cumming. After a while, and with me starting to feel the pain, Shella went and cleaned her strapon. Marilou kissed me gently as she stroked me back to hardness. She then climbed on top of me, and started to fuck me with amazing skill. Shella then returned to the bedroom, and kissed Marilou. Marilou then climbed off my dick, and, as Shella lay down, she straddled my wife and started to put her cock into her. Marilou always felt tight, especially compared to Shella, so I was amazed that she took the full length. I positioned myself so that my cock was in her face. She took it into her mouth and sucked as she fucked my wife's strap on. She was soon cumming and so was I. She let my cum dribble onto her tits. Me and Marilou then showered together. Soon it was time for her to go home, her son, a 20-year old mixed race kid who was really good looking, spoke to me and Shella politely. I shook him by the hand and then gave Marilou one last hug. Shella hugged Marilou's son. When they left, Shella turned to me and said "He was erect". When we got back indoors, she mentioned that maybe we should invite him over for her to enjoy. It seemed like a good idea, but we never did it, although it was a topic of conversation in the lead up to some amazing sex. Also a topic of conversation was the many things I got up to with her best friend, as she lay awake in the next room wondering what was happening. On the plus side, our sex is now more adventurous. We have never had anyone else in our sex lives since Marilou and, sadly, I think that the experience resulted in Shella and Marilou speaking less frequently. Shella indicated it was a "one-off" and that is how it appears to have turned out. But, what an experience it was.