MILF bareback surprise

This happened a few years ago when i was single and living in Wiltshire. I was invited to an evening out celebrating my mate Sue's birthday. Sue was married to W**** and we all had shared a house together when i worked in Norfolk. They had since relocated to Somerset to be nearer to her family. Sue was the middle of three sisters, S****a and S**** being the other two. All three girls and a couple of other guys as well as myself were invited along to a Robbie Williams tribute act, i wasn't sure about the entertainment but it sounded like a good excuse for a few drinks and to let my hair down, (not that i had much). We met up at Sue's place and shared a couple of taxis over to the pub with the understanding that I could stay overnight downstairs with the other two lads, who it turns out were both gay; this didn't bother me much, in fact this later acted in my favour.
When S****a walked in i hardly recognised her from the quite frumpy housewife i had met before; she had lost weight and looked really fanciable in her glad rags, she wasn't showing much flesh but i could tell she was pretty fit and shapely. Not that i allowed myself any thoughts of getting intimate with her, i knew she was married, even if it was common knowledge her relationship wasn't the best. But she did look great scrubbed up with her glamorous hairstyle and she was obviously in the mood to party. I didn't think i would stand much of a chance with her, as she was not only older than me, in her mid 40s at the time; but she was also a bit taller than me, especially in her heels. However one thing that i had in my favour was my freshly shaved head which i later found out she found sexy.
Anyway at the pub the drinks flowed and we all had a good time, probably in part due to the fact the act looked and sounded nothing like Robbie Williams! The girls took it in turn dancing with us guys. Obviously the other two had more rhythm than me, being gay (!) but i hit the jackpot by getting to dance with S****a during the rendition of "Angels". We both started singing along to each other and she pulled me close to her as we smooched. Inevitably my cock started to react to this and quickly became semi hard. S****a felt me against her leg and smiled broadly and gave me a peck on the cheek. She said something along the lines of "at least i know you're not gay!". I thought no more about it other than at least she doesn't seem to think I'm a pervert!
I shared a taxi back to Sue's with S****a and S**** and we were all a bit merry. S****a was being very attentive and took me by the arm, but i just put it down to the drink talking rather than assuming i was on a promise.
At Sue's, we all had a late night game of anything goes Scrabble (!) and another beer. When it was time to get some sleep, as i said i assumed i would be downstairs with the guys. However, S****a had a word with her sister and convinced her to let me sleep on the floor in her room on the grounds that i would get a better nights sleep away from the farting and belching boys, and she trusted me not to take advantage!
I set up my sleeping bag on the floor and S****a was in the small k**s bed . She turned off the light and invited me up for a chat. By this time she was complaining of a headache. We talked about her k**s and the rest of her family, her job and marriage. I offered to give her a soothing head massage and i started gently rubbing her temples along with her neck and shoulders. She liked this a lot. At the same time she was complaining that her husband never gave her any attention and that she didn't want to go near him anyway (he was a pig farmer who didn't bother much with personal hygiene!). In for a penny i thought, so i told her i thought she was a really caring lovely woman who deserved better, and I'm not just saying that because i have a big erection! By this time i was just in my teeshirt and boxers and my cock was fully out, the helmet shining in the low light. Have you any protection? she asked; fortunately i did for once! I fumbled in the semi dark for my packet of Avanti and managed to get one on. I then snuggled in with S****a who was naked from the waist down. She opened her thighs and the head of my cock nestled against her pussy, but before i entered her i needed to be doubly sure this is what she wanted. She whispered yes i want it please; i said ok your wish is my command we need to be as quiet as possible. Sue and W**** were in the next room...
I started moving slowly deep inside her but i couldn't last long as the excitement was way too much! I said i can't believe I'm fucking someone else's wife it feels really naughty! I pulled out and she indicated she wanted me to lick her which i was more than happy to do. Her pussy was completely smooth and tasted wonderful. She helped me along by playing with her clit while i licked and sucked on her pussy lips. She was soaking by now and it wasn't long before she had an orgasm, she was obviously gagging to cum.
I moved back up the bed to kiss her on the mouth and her pussy welcomed my erect-again cock back inside. Trouble was the condom had slipped off and my bare cum covered cock didn't want to come back out! She said don't worry, I've just had my period so we should be ok.. I wasn't sure this is the best method of contraception but i was passed caring as was she ! It felt beautiful, I could feel every ridge of her pussy walls with my bare cock and it wasn't long before our hips were grinding together desperate for further relief. Despite me saying we need to be quiet the bed was now creaking quite loudly! The inevitable happened and i came deep inside her as she cooed "that's gorgeous" in the sexiest Somerset accent I've ever heard...