Nasty Cheating Wife: I Fuck My Husband’s Sister

I’m a nasty cheating wife and I love it! 

Cheating on my husband is a big thrill and one of my secret pleasures. I love the excitement that comes with the feeling of danger. Forbidden sex is always more intense and arousing, especially when there’s a risk of being caught. One of my most memorable experiences of being a nasty cheating wife was the night I seduced my husband’s sister and fucked her during the Christmas holidays!

My husband’s sister is very English, which means that she’s outwardly prim and proper and very respectable. She also has long legs, big breasts, and beautiful blonde hair. When we all rented a villa together over the summer, I took every opportunity to change for the beach with her. I blatantly checked out her shaved pussy when we undressed, and once let my hard nipples ‘accidentally’ press against her when I pretended to lose my balance.

The closest I got to making a real pass at her was rubbing lotion into her sunburned back. I tried to turn it into a sensual massage, but my husband interrupted us. I’d wanted to fuck her since that holiday, I was really excited when she agreed to stay with us over Christmas with her new boyfriend.

I decided that whatever happened, this nasty cheating wife would fuck her at least once! 

The first night after they arrived, the guys all ate too much and sat by the fire drinking beer and watching some stupid war film. I suggested to my sister-in-law that we grab a bottle of wine and watch a chick flick upstairs. She agreed and we sprawled on the sofa with a glass of wine. I encouraged her to put her legs over my lap and began to massage her feet through her socks.  I was in nasty cheating wife mode and she was my target!

After another glass of wine, I asked if she still shaved her sweet English pussy. The question shocked her but she started to flirt. She replied that she’d just had a full wax and was completely smooth. I said that I was thinking about doing the same, and demanded that she show me how it looked. After about 5 minutes of cajoling, she stood up and unbuckled her belt. She shrugged her jeans down to her knees and then hesitated for a moment.

I knelt in front of her and eased her panties down. Before she could react, I leaned forward and kissed each side of her groin, just above her pussy. When she didn’t push me away, I probed hard with my tongue just above her clit. She gave a sharp intake of breath but didn’t move. I’ve nasty a dirty cheating wife many times, sometimes with women – but never with my husband’s sister!

I grabbed her arse with both hands and pulled her slightly towards me. 

I made my tongue as soft and wet as I could and let it play gently over her clit. Now she moaned and her body stirred as I licked. Next, I slipped the tip of my little finger into her pussy. She was already wet and I replaced it with my index finger and began to fuck her like the horny, nasty cheating wife that I am.

I knew that she was mine now. I began to fingerfuck her more aggressively and lick her more intensely. She moaned and writhed, grabbing my hair and pulling my face into her wet pussy. I suddenly stood up and took her by the hand. I bent her over the arm of the sofa and slapped her arse hard. Then I pushed two fingers into her tight wet pussy and fucked her doggy style with my hand.

I knew that I was cheating on my husband as the guys watched their stupid film downstairs. I wanted to fuck his sister properly, and without a strap-on, a good hard fingerfucking was all I had. And so my husband’s little sister thrashed and moaned in ecstasy on the sofa arm as I rammed my fingers into her pussy until my wrist hurt! Being a nasty cheating wife had just gone up a level…

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