It was a damp November night and the wife, Mary had gone out with some mates. I had settled down with a bottle of red wine in front of the TV when the door bell rang. At the front door was Mary's sister, Jane wearing a long coat and rather wet. She came inside and slipped out of coat to reveal her sumptuous body clothed only in a black basque suspenders and stockings. She quickly told me that she was desperate for sex.  Her husband was completely failing to satisfy her any more and that as she new that Mary was going to be out she hoped that I could do something to gratify her desires.

With out waiting she unzipped my fly and removed my trousers to expose my now rampant cock, dropping to her knees she gobbled away as I removed my shirt. Hooking her up by her hair I slipped her tits out of her basque and stuffed a couple of fingers up her very damp cunt. She started moaning and I turned her round and bent her over the back of the settee. Forcing her arse cheeks apart I ran my tongue down her crack and between her cunt lips. By now she was begging for it so I stuffed by cock straight up the sluts cunt. She loved it, gasping for breath and moaning.

Slipping out for a moment I admired her arse which gave me a delicious thought - I'll screw her arse - something Mary had never let me do! MI edged my cock, slippery with her juices, towards her arse hole and began to push. She screamed "No not there you bastard" but it was too late.  I knew want I wanted and gave a shove. My cock slid slowly in to her tight little arse hole and she immediately began to respond by pushing back.

"This is want you wanted you slut" I told her and her whole body shuddered as she had her first orgasm. Thrusting away I shot my load into her and she gave a satisfied sigh.

Withdrawing my cock with cum running down her thighs I turned her round told her to clean me up. She lapped away and the dirty little madam didn't stop until I Was throbbing away and ready to come again.

"Fuck my cunt" she said, lying on the floor with her legs spread. I was on her in a moment and shot a load deep in her cunt as she reached another extreme orgasm.

What naughty sister in-law!

To be continued