Keep married sister happy

It all start in the new year eve ,I'm Abhay 24 years old live in town where work as a manger in a big company belong to a family friend .My parents live in the village nearby ,I move to town 6 months ago joining the company ,i was given a one bedroom apartment and a new care to drive by the company life was ok job was ok sex life was ok i met with few ladies end up having sex .My older sister Renu 5 years older than me married 3 years ago with a 2 years old baby boy Amit ,her husband Vijay was 15 years older than her a businessman travel a lot ,he was a player having lots of ladies which make my sister sad and mad .They live in other town about six hours from me so we don't see each other that often only when we go visit our parents then we will spend time together ,one day we were at our parent house when she told us about her husband dirty life and how he neglect her I was pissed I love my sister and nephew and i was so angry Renu make me promise not not do anything crazy to get me in jail .Sunday afternoon we were leaving our parent house so i gave her a ride to the train station while driving she told me she want to divorce her husband if she can move in with me for a while till she got her own place i was happy to have her with me I agree .Few months later a week before new year she told me she is going to my parents house for few weeks for new year i should come ,i took a week off drove to the station pick her and Amit then drove to mom ,on the way she ask if i'm still ok if she move in with me i smile saying yessssss .On the third day hse was playing with Amit on the bed i join them we both was playing with Amit when all of a sudden she open her legs while sitting on the floor I was shocked she didn't have panty and i can see her pussy with large lips ,I could stop looking when i feel a light slap on my shoulder i look up seeing her big smile got me so excited i got up walk away ,Two days later i was going to a count down party at a friend place in town Renu came to ask if she can come with me i knew she been so miserable lately because of her asshole husband so i told her yes she was so excited ,since i saw her pussy i want to fuck her so i decided no matter what I will make her mine .I took her shopping to the mall for new dress for her gift for our parents and for her son ,she was so excited for the party she told me to pick her clothes for the party .Usually she wear traditional dress as a married woman so i try my luck i pick a nice mini skirt with a blouse at first she hesitate she say no she can't wear those dress it's not decent ,i told her to try she is my woman tonight she look in my eyes shy she say "so you want me as your woman fine with me tonight I'm all yours ,maybe we should tell your friends I'm your new girlfriend nobody know me there .After shopping we went to eating something and she was acting as my girlfriend already hugging ,holding hands ,sitting next to each other we were behaving as a couple ,once home things has change between us we were closer than before ,we would hug more often .At six Pm i was ready sitting in the living room playing with Amit when Renu came down looking so sexy and beautiful i was hard she is shorter than me thin body nice little round ass and small boobs she look just as an Bollywood star .At 8 pm we were in the party Renu next to me holding hand having few drink and dance it was fun ,around 11 pm we were in the yard with other when i grab her kiss her on her lips sucking each others tongue ,we were both horny she had her hand on my crotch rubbing now my fat long hard dick while i slide my hand under her dress i was surprise she wasn't wearing panty insert a finger in her i whisper "no panty that's my girl you are mine " looking up at me she said"yes all for you my lover my lovely boyfriend i can tell you are hard and its big i want to see it ",i walk her to a corner behind a big mango tree .Looking around nobody around I remove my dick she was shacked seeing my monster without a word she kneel down taking it in her mouth ,i couldn't believe my older sister is sucking my dick and she love it "it's very big long and fat not like hubby he is not even half of your length and girth i need to have this inside of me right now ,i know hubby won't feel me after that night and I don't care i will be only yours for the rest of our life ".I was happy to hear that so i took her in the house get a room we undress she kneel again continue sucking she was doing a good job i have to stop her before i cum ,i lick her beautiful sweaty pussy making her cum in my mouth then i position myself slowly penetrate her she was to tight for my dick ,once inside i stop moving giving her time to adjust till she start to move her hips slowly little by little we speed up her pussy was so wet it got me more excited hearing the sloppy sound of her wet pussy ,her moaning and screaming i pound her missionary then doggy at last she was riding me hard and rough till she explode with pleasure cumming a lot i can feel her warm juice flow on my dick and it was getting tighter that make me cum after about 25 mins of hardcore fucking ,i shot a big load deep in her we both fell on the bed tired .After the party we call our parents telling them we will stay in town be back tomorrow ,we went to my apartment i told her i love anal and want to fuck her virgin asshole and make her mine .And yes i was in her ass very tight and painful but she enjoyed it ,we fuck two more time .after a month she came with her son and few bags telling me she is pregnant and gonna divorce hubby and I'm the father .I was both shocked and happy that night she came to the living room naked bite marks all over her sexy body so yeah she came in the liv kneel down she pull my boxer take my cock in her mouth suck and lick it then get up she sat on my hard dick riding me so hard till we both cum .One night we were watching a porn two guys double penetrate a girl she ask if i ever done that i told her no but want to try she also want to try so we found a guy online .A week later we were in a hotel room outside town me and the guy fuck Renu in both her holes and she enjoy having to dick same time in both holes ,after our baby girl was born we were a couple and our parent knew they couldn't say anything because we were adult ,once every month we find guy or girl for 3some and Renu favorite double penetration .we live together as a couple with our kids life is good last week she had her first gangbang of seven guys i don't mind as long she is happy and safe