I was now 22 and Sally was 20 when l met Trudy at an aunt and uncle’s anniversary, she was their daughter, my aunt introduced us and l asked Trudy out on a date, Sally was angry to say the least, but l promised l would never give her up. Things got more serious with Trudy and she seemed to know there was something going on between me and my sister Sally, she would ask if l tucked Sally into bed that evening or joke did Sally mind sharing me, l just knew Trudy knew l was having a relationship with my sister so l confessed everything, Trudy first went quiet then said because it was my sister l wasn’t really two public timing her and added l could carry on the relationship with my sister, but she Trudy must come first. That evening after giving my sister’s bum a slapping then fucking, we lay together and l told her what Trudy had said, things can carry on as normal and because l had always made decisions and controlled what Sally did ever since she was a small girl it was easy for me to convince her she was only to have my cock filling her pussy as she was my toy, but emphasized it was alright for me to fuck Trudy teen and her. It was working well fucking both girls because on the nights l wasn’t seeing Trudy then l would fuck my sister Sally, Sally didn’t bother what me and Trudy did, but Trudy would often ask what Sally and l do in bed or if my sister swallowed my cum. I tried M&S with Trudy, but it wasn’t her thing, l told her how Sally liked to be tied, slapped and whipped, and l take my sister to a pig meet where she has to wear a pig nose and the things l make her do. A few weeks later Trudy said her parents owned a caravan on the coast and asked if l would like a weekend away and my sister could come with us, l thought she wanted Sally to come with us so her parents amateur didn’t think it was a dirty weekend which l hoped it would be. We got to the caravan doggystyle in the afternoon the place was lovely and Trudy declared the double bed was hers and mine pointing out Sally was in the room with single beds which l had to push together because of my sister’s size, she was now over 19st but still nimble in bed. Everyone unpacked we went shopping then Trudy started dinner at the same time the wine was opened. The meal wasn’t much but everyone enjoyed it, Trudy told my sister Sally she could do the dishes because Trudy prepared the dinner, Sally said she will do it in the morning, Trudy didn’t answer she got up went to the bedroom and came back with a thin belt and ordered Sally to bend over, Sally glanced at me as if to ask if she had to do as Trudy ordered then leant over the bench seat and Trudy whacked her hard with the belt across they arse and repeated ‘wash the dishes’ then gave Sally one more whack with the belt. We left her to get on with the dishes while me and Trudy went for a walk, Trudy was telling me how excited she felt whacking my sister the power was exhilarating it really turned her on. We had to find a quiet spot so l could fuck her and by the moans and whimpers Trudy was making she was excited. We got back from the walk all the plates were done and Sally asked if we wanted wine, Trudy said blowjob she will pour the drinks because my sister did the plates as Trudy poured the wine l whispered to my sister she was to say ‘no’ when Trudy asked her to help out, Sally smiled and nodded, she got just as excited by being whipped as Trudy got from whipping her. The next day Trudy would find any reason to give Sally a whipping on the arse with her hand or belt, she was now making my sister take off her knickers so there were red marks across her bum cheeks, l would suggest Trudy made Sally crawl on all fours, every time Trudy punished Sally l had to take Trudy to bed for a fucking because she got excited, she allowed my sister to watch us fucking then permitted her to suck my cock till l shot my load into her mouth, Sally would have to open her mouth to prove she swallowed all l shot. I got a shock one afternoon because Trudy told Sally to fuck her with a vibrator she brought along, l shot my load by just watching the pair of them on the bed. I would have to say the weekend was a complete success and was the start of much fun for the 3 of us. Trudy and l got married about 7 months after that weekend which didn’t stop the fun. Then mine and Sally’s parents passed away so she moved in with me and Trudy but Trudy insisted on ground rules. 1/ My sister Sally had to be on call for Trudy. 2/ I was only allowed to fuck my sister when Trudy said. 3/ Sally would be Trudy’s slave pig girl as well. 4/ My sister Sally could only wear what Trudy told her to wear, Sally would buy the clothes Trudy picked for her to wear. There wasn’t a lot of rules but they covered everything and Sally was more than happy because she wasn’t alone and l loved having her with me and my wife who was building up quite a friendship with my sister. The vows. I've been having sex with women. I gulped it. “wooohoo!” All the public teen horny guys shouted at the same time. So now mom is blowjob a family slave to use and abuse anytime we want. She fluffed it and smiled down at me. “Lift that cute tush, honey. doggystyle A few minutes later someone walked in the front door. “Did you just…” she amateur started, looking over my body, “did you just bind with me?” I shivered in excitement. It was a different era.