My girlfriend shared a large flat with a girlfriend. They had been together in the flat for a couple of years. I had briefly met Janice on the times I stayed over, but other than the odd hello and how are you, that is the closest that I had been with her. My girlfriend, Darcy, was very noisy in bad and at first I was embarrassed knowing that Janice must have heard our love making. I knew that Darcy had been around the block, so to speak as two of my mates had been there before me and one took great pride in talking about their exploits.I knew she liked outdoor sex, as we had made love outdoors a few times, but wasn't aware that she had been in several threesomes according to his bragging. At least one involved Girl on Girl action and finally he talked about Darcy pulling a train. I has not seen any evidence to back up what I thought were wild claims. Darcy told me that she had just been promoted at work and that she would have to go on a three week course as part of the training for her new role. I was pleased for her as she worked hard and I took her out for a celebratory meal. Walking away from the restaurant after the meal Darcy wanted to prolong the evening and suggested we went to a trendy bar called Tramps. Inside Tramps it was heaving with people and I struggled to get to the bar. On my return Darcy was talking with a bunch of girls, most of whom seemed pretty well oiled. One of those was Janice. A few of the girls joked about where had Darcy hidden me from them. One of those joking around was Janice. The talk got raunchier as the evening continued. Then one of them made a remark about how I managed to keep up with Darcy. Janice butted in that from what she heard I was more than cable in that department and wouldn't mind some herself if there was any left over. Darcy joked, well you can have him all to yourself for the next three weeks. There was some laughter and whooping at Darcy's offer. Shortly after I walked both Darcy and Janice back to their flat. I was arm in arm with one on each side. When we arrived at the flat I kissed Darcy goodnight and as I was about to leave Darcy said," What about Janice, after all your hers for the next three weeks." Janice stepped forward and kissed me and stuck her tongue in my mouth. I was a bit embarrassed, my girlfriends best friend and flat mate had her tongue in my mouth as my girlfriend watched. "That's enough," said Darcy, "hes mine until I'm away," she joked. Then Darcy gave me a deep kiss and I was then on my way home. The following evening Darcy called me, "Hi, hows things." I told her everything was fine. "Thought you'd be round the flat looking after Janice," she stated. Her voice seemed to have a serious note to it. I explained that I had brought some work home and needed to get it done. "Perhaps you can take care of Janice tomorrow." We talked about how our days had gone and that her course was good and she was enjoying it. Then we blew kisses down the phone and ended the call. I finished the work I needed for the morning and turned in for the night. I lay thinking about our call and that she was pushing me towards Janice. Was this a test. Was she trying to see if I was faithful to her. I wished I knew. Then I fell asleep. Next day I got a call from Janice saying she had talked with Darcy and that she wanted me to look at a small water leak in the flat. She hoped I could do something for them, to save them a big plumbers bill. I promised to have a look. I took a pile of tools, not knowing what to expect. It turned out to be the toilet overflow had started to run because the ball cock was not shutting the water off early enough. A pair of pliers and a screwdriver had the problem fixed in moments. Janice had poured me a cup of coffee and as I sipped it, she said, " One problem fixed, one to go." I looked at her confused by what she meant. She laughed and pulled her top off. She wasn't wearing a bra and she had a nice rack that normally I would have been all over, but I was in a steady relationship with Darcy. I told her that as much as I would like to take her up on her offer, I was with Darcy. She shocked me when she said that she was also in a relationship with Darcy. She went on to say that when I wasn't there they would often sleep together. She went on to say that Darcy was the best female lover she had ever had, and although they both needed cock sometimes, they both still enjoyed some fanny. I was shocked and stunned. She was then telling me about some threesomes they had enjoyed and even a gang bang that they held in this very flat. She could see that I was not convinced that she was telling me the truth. She went over to a drawer and pulled out a photo album. The first page showed both of them naked holding hands on a beach. The next page was the two of them kissing whilst still naked. By page five they were in the 69 position and it was clear that they were sucking each others fannies. She said that Darcy was afraid that up til now, if she had told me about her preferences that I would have run a mile. I told Janice about one of Darcy's former boyfriend, and what I had thought were boasts. Janice told me that they were all true. and there were many other situations I had not heard about. She went on to say that Darcy had been faithful in as much that she had not been with any other men since going with me, her extra curricular activities had only been with Janice and on one occasion Janice and Paula in a threesome. She told me that Darcy was being sincere when she said I could look after Janice. As I sat there, still shocked at all the revelations, Janice sat on my lap and stuck her tongue in my mouth and then rubbed her tits in my face. My cock was soon causing me discomfort as it was trying to grow and Janice's arse was restricting it. She must have felt it pressing into her arse as she stood, stroked it through my trousers and then taking my hand led me to her bed. She dropped her shorts on the floor along with a blue thong. She was now totally naked. She had a good looking body and I could understand Darcy enjoying it. Then she was undoing my belt. My trousers and pants hit the floor as did Janice. She took to her knees and sucked my cock into her mouth and sucked as she took more into her mouth. She sucked and bobbed her head for about ten minutes. The she took it from her mouth and stood up. "Darcy was right, you do have a very nice cock," Janice informed me. "I'm going to enjoy fucking you," she said, just before she attacked the rest of my clothing. Then she pulled me with her onto the bed. I wanted to taste her pussy before battering it with my cock and stopped her from getting me to just mount her. She was disappointed at not getting my cock straight away, but was more than happy to have my tongue licking her lips and clit. "Your nearly as good as Darcy," she gasped as I tried to penetrate her with my tongue. "I can't wait to have both of you at the same time," she groaned as my tongue lapped her juices. Her phone rang and as I continued my attack on her fanny she answered the phone. Breathlessly she said," Yes he's here. Ooooh. He is good. Aaaah. Yes he's licking my pussssssy Arggggh. He is good, you were right........... No we've not fucked yet, but we will sooooooooon. I'll call you later." Then she put the phone down and pulled my up between her outstretched legs. I slipped easily into her fanny. We fucked like wild animals for the next ten minutes. Then we lay cuddled together. She picked up the phone and dialed. "Hi, that was some fuck................ Yes your right he is good at licking fanny..................... You can stay away as long as you like............. I know he's yours.............. He's mine till you get back............. You want to talk to him." Although I had only one side of the conversation I had laid there filling in the rest of it in my mind. "Hello Darcy." "So you've fucked her now?" "Yes I'm sorry," I claimed, although I wasn't really. "What are you sorry for? I told you to look after her. If you don't look after her fanny while I'm away she would go off the rails again. Make sure you keep her satisfied until I get home. By the way did you manage to fix the leak." she asked. I told her I had and that I would look after Janice for her. We blew kisses and rang off. "She told you to look after me," Janice said rubbing her fanny for me to look at. "You'd better make good on your promise," she said. Straddling me and rubbing my cock against her dripping fanny. Once hard she lowered herself onto my cock and rode me to heaven. Later as we cuddled she asked which old boyfriend had spilled the beans. I told her and she Laughed. "That wanker. Yeah we did stuff with him. But he got jealous when I got a gang bang in the social club and Darcy helped me out because there was too many of them. He walked in and see her taking on six or seven cocks. So Darcy binned him. You don't get jealous do you?" she asked. "I don't know, I have never seen my girlfriend fuck other men. Let alone six or seven, but I'm definitely looking forward to seeing you two together." Janice giggled then went down on my cock again. I went home exhausted. She called every couple of days for me to come over and service her. Then Darcy was home. She insisted that the first night was for her, as she had missed my cock. We fuck furiously for the first one, and then made slow gentle love, as Janice watched our second shag. Then we lay in bed relaxing. Janice climbed in to snuggle up to the two of us. It was the most sexual feeling I had ever had, well and truly fucked and two sexy ladies naked cuddling up. As we lay there, Darcy asked," Would you be mad if I told you that I screwed someone else while I was away?" I thought for a few moment. I remembered what Janice said about Darcy binning her boyfriend for getting jealous and that I had been shagging Janice. The answered," No of course not. How could I after making love to Janice." "Great. I fucked the tutor on my course," Darcy replied as she took a dive under the duvet, not at me but at Janice's pussy. This was my first time at watching girl on girl live and not just on the internet. It didn't take long before the girl on girl became a threesome. The biggest problem with threesomes is which one to fuck first. It's a problem that I am more than happy to have. The girls have warned me that they are wanting another gang bang. After thinking about it I told them to include me.