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Had an accident with my mother in law

So we’re just back from a week away with my in laws. A week in a private villa in spain. Our own private pool too. Id taken a couple speedos with us, more for fun with the wife than anything.
we thought the we were home alone so i dug out my brief, one thing led to another and me and my misses had a long hard fuck not caring. I walked out the room to find the mother in law in living room, my cock was still filling my brief post fuck, it caught her attention, she stared but didnt say anything.
me n the wifes step mum have always had a good relationship, always flirty etc. She’s a size 12/14 uk size, seems pretty body confident.
In the evening she was flirting with her hubby, hand on his thigh a lot, laughing at his shit jokes, wearing a black low cut one piece swimsuit with a flowery skirt.
Fast forward to near bedtime, my misses was fast asleep, i was reading outside, i still had my speedo on, i went in for a drink but before i entered the villa i could see the mother in law with her head in her hubbys lap, bobbing up and down, i watched on as she stood up lifted her skirt, pulled her swimsuit to the side and lowered herself down, she rode him for the best part of a minute before he came. He was done. No longer interested he moved her off of him, kissed her and went and went to the toilet.
my cock was hard by this point, i went back and sat back down waiting for her to disappear. When she didnt i poked my head in to catch her quickly straightening herself, her swimsuit still pulled to the side of her pussy she’d been trying to satisfy her neglected pussy. I was still half concealed, she couldnt see my lower half, so i decided to remove my jeans, we chatted for a few minutes whilst i massaged the tip of my cock making sure it was filling my brief. We’d both been drinking so decided i could probably get away with what i was gonna do. Her eyes were instantly drawn to my bulge. She bit her lip. I presumed she was storing one for the wank bank.
I sat down beside her, her eyes still fixed. I apologised for earlier for being loud. Still watching my crotch. I adjusted myself, pulling the brief tight. I asked if he always disappointed her sexually, she started by denying but when she realised what id seen she admitted to it, she spoke about how he never used to, mention they used to fuck loads, as much as they could, wherever and whenever. I made a point of making my cock twitch when she spoke about it, it encouraged her to open up more and more. I asked if she had to masturbate after sex a lot now, apparently thats how it goes for her now, apparently she’d been caught a few times but he never got the hint.
my cock was starting to leave a wet mark at its tip, i apologised for my erection, mentioned that i couldnt help it as she looked fantastic in her swimsuit. She blushed. Eyes still locked on. I took her hand, moved it down between her thighs, my free hand moved over my brief, grasping it, using my thumb to massage my tip, her fingers soon massaged her lips, she admitted we shouldnt be doing this, i agreed, but kept going, my hand spreading her legs further. I pulled my shaft out. He hand snuck into her swimsuit. She worked away at her clit, wriggling as she got into the rythym, i reached across and slipped her boobs out, this just encouraged her, small circles got bigger and faster. Her hand reached over to my balls. She was soon cumming, i could hear her mature pussy getting wetter and sloppier as she worked it. She let out a wimper, a shudder, a little moan before she became still.
She was really apologetic, this is wrong etc etc. I calmed her down, we’d done nothing wrong. I got off my seat, horny as fuck, and explained to her as i knelt down in front of her that if i was to slide my cock into her, that would be wrong, as i done this i pressed my tip against her exposed pussy, leaving it up to her what way to move, she lifted up, resulting in my tip sliding down her wet clit to her hot moist hole. I explained it would be really wrong to thrust my cock into her as i slid all the way in, i repeated that it would be really really wrong to fuck her as i slowly built speed, thrusting my whole shaft as deep as i could. Her fingers were back working her clit. She told me to be quick, so i got faster and faster, my balls slapping against her, her nails digging into my back as i ploughed her deeper and deeper. I pulled out at the last second, firing my MASSIVE load all over her swimsuit, she kept massaging her clit as she let out a massive groan, shuddering more this time, twitching and shaking, she lay back and told me this shouldnt have happened, scurrying away to bed.
the following day she wouldnt look me in the eyes. That was until i reassured her i wouldnt say anything before slipping my hand into her bikini and getting her off at the breakfast table before our other halfs came through.
since then we’ve been up to a lot more. She wants to keep it going, she loves being fucked by a younger guy
 

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