Follow up to previous stories.After a visit from Elens sister and brother in law,its usually a few months before we meet up again.However Sam seemed very keen and arranged to come over for bank holiday weekend. We normally have a few people over but as I was keen to have some fun I kept it to just the 4 off us.I got the hotub all ready as it was a lovely day.Every thing was going well,when Sam had a word with me in the kitchen about the other week when he had a wank over Elens big arse.I said I'm sure she is up for it but doesnt want to do dirty on Dot her sister plus would be embarrassed fucking in front of me.Simple he said you fuck Dot and I will fuck Elen in separate rooms,problem solved.Well I'd never fancied her as she is 10 years older than Elen and not much to look at but if that's what it takes.I said would she be up for it he said that had spoke about it and as she had only ever been with Sam since 16 she wanted to try a different cock.Ok then let's go. I took bull by the horns and said weve had a naked hotub before so fuck it.We all striped off and got in.Sam sat beside Elen and starting snogging her with me and Dot just watching.i could see him starting to feel her little tits and play with her big nips.I was mesmerised and really turned on as I'd wanted this for years.it was then that I felt a hand on my leg and I turned to face Dot.she said come on then and we started to kiss she starting to stroke my cock and it felt great .Sam and Elen then got out of the tub and headed inside I watched as they walked away Elens big arse was red from hotub and Sam's big cock was standing to attention.She gave me a smile blew me a kiss and the went inside.I then stood up and offered my cock to Dot who started to suck on me.she was not as good as sucking dick as her sister but who cares I was soon comming into her mouth and she swallowed the lot.some things do run in family.However it was really Elen I wanted to see getting fucked so I said come on let's go see the others. We went upstairs to bedroom and went in.Sam was on top of Elen slamming into her and she was moaning like a porn star.she is normally very quiet in bed.I bent Dot over the edge of the bed and easily slipped into her very went cunt.it felt so much slacker than her sister but it would after many years of Sam's big cock up her.anyway I started fucking her whilst watching Elen getting screwed.in no time Dot started comming which was a surprise but she said later it was just nice to have a different man fuck her.i then heard the tell tale sound of Elen comming and that sent me over the edge and I came up Dot.Sam kept going for bit longer before tensing up and pumped his load up Elen.he got off her and his cock was still massive and dripping with Elens juices.i got on bed and started to kiss her and she said that was great but I still love u but I loved his cock it was so big.Sam then said if this is a one off we might as well go for it and offered his semi hard cock for Elen to such which she done with difficulty.I went down and had look at her pussy which was gaping open and very wet.couldnt help my self and starting to lick her out it was great so hot.She came almost straight away and pushed my head away.she can be very sensitive after comming.i went back to her sister and we just watched as she sucked on Sam's cock.wasnt long before he started to come and like her sister Elen swallowed the lot.we all then put pjs on and went back downstairs.when fixing drinks Sam asked did I like fucking Dot of course I said she was very wet and good cock sucker.I said what u think of Elen and he said again great at sucking dick and tightest pussy he had ever had.and that he had wanted to fuck her ever since she was 16.Not sure this is going to be a regular thing but u never know.