Collecting

My sister Isabel 21 is a hoarder of barbie dolls, she claims its a collection. But she has over a thousand of them. Recently a rare doll first release doll came up for sale, it was way out of her price range. She wanted it so bad, but there was no way she could get it. That were I came in I'm the oldest of 5 and Isabel is the youngest, I've made success in my career as computer game programmer and at 34 have my own house and investment properties. I not married and haven't had much success with females. Unless I pay for it, it was the first Sunday of May and Isabel came over to see me. A rare event and I knew she wanted something. But she didn't asked straight out what she wanted and just made small talk. So I finally asked her what she wanted and she showed a picture the barbie doll he wanted. I said What is made of gold, for that price it should be. She tried to convince me it would be a good investment, but I wasn't buying it. Finally she said I will trade something you want, if you buy me the doll. Like what do you have that I would want I asked. A female body she responded, shocked by this I finally asked What are you suggesting. I will let you fuck me for six, no twelve months. Your making fun of me I said. No I'm serious and if you agree now you can fuck me now she offered. I said It's a auction and we might miss out on it I said. Then no more sex if we miss out, but you can fuck me everyday you want to the auction She said. Isabel has a very sexy body and I get hard on just thinking about her. Are you really sure you want to do this and won't hate later I asked. Yes I'm sure and I won't hate you she answered. To help me make up my mind she undressed completely and stood naked in front me. I couldn't resist and agreed and she took my hand and led me to my bed. She had me undress and lay on my back and she started to stroke and kiss me and worked her way down my body. My cock was as hard as a rock. When she got to it she stroke and started to suck it, I couldn't hold my cum back and I just warned her before coming. She didn't stop sucking my cock and took all my cum in her mouth and swallowed it all. She then sat on my face and told how to lick her out, after that she went to my cock and got again and mounted me. I blew my second inside her and we later a shower together and we had great sex almost every day up to the auction. We both attended the auction and the barbies was a hot item and there was a few bidders besides us. After the bidding had being going a while I made a large bid over the top of the last bid and it almost did the trick. As the other bidders stop bidding except for 1 and so I repeated by bidding another larger bid and that done it. We got the doll, almost twice what it was expected to get. Isabel promise me I wouldn't regret it, as we were in the city for the auction we stayed overnight, before returning home. Isabel was so happy that she had the doll she said to I'm now your sex slave anything you want to try with a woman you can do to me. I just looked at her and then she added I'm a anal virgin, so you will have to take easy the first time if want to do anal. I hadn't thought of anal and wasn't keen on that. But I said I would like to try some different positions and made roll play sex. Alright she said and she undressed, I've been getting sex everyday since and reckon it the best investment I've made. If I was paying for the sex I'm got so far I would have almost paid for the doll already and I've just over a eleven months to go. Our parents are go to move to the city and were surprised Isabel said She want to stay in our hometown. She said I can stay with Harry and I'll be alright, my parents told her I might not want a house guest as I like my privacy. That with strangers she said and rang me and told me that our parent going move to the city and that she wanted to here and she wanted to live with me. It would okay by you, Harry for me to stay with you. I was taken by surprise and said it's no problem, your most welcome to stay with me. So this coming weekend Isabel is moving in with me and told that she will use the bedroom to store her collection and she will share my bed. I can't wait, my mother was quite surprised as she thought I wasn't keen on having visitors. But Isabel keeps telling her that she is family not a stranger and mother is happy I won't alone. Me and Isabel were fucking yesterday and mother turned up with curtains she was getting rid of and thought that would do for me. We were lucky she called out and didn't straight into the house. As I was fucking Isabel in the lounge room. We were able to dress quickly and go out help her unload her car. She stayed and directed us how to hang the curtains, Isabel only had a dress on and nothing underneath. She also had cum running down her legs, I had a cum stain on my jeans. Mom didn't notice anything, after we had coffee and sat talking in the kitchen. I was happy when she left. Isabel burst out laughing, saying I looked mortified the whole time. Isabel gave me a blowjob in the shower and then left. Saying I'm going to drain your balls all weekend.