I’m Rob , married to Linda , we are early 40s , been together since high school. We stay in small garrison town in UK . I work in nearest large town. Linda is manageress in small high street store in town , overseeing half a dozen part time staff . Linda and the girls go out one night every month on pay day for a few drinks and a laugh. Normally she comes home half pissed about 1 in morning and talks constantly about what’s happened, annoying me something awful until she falls asleep. This night however, she comes home, very quiet, slips into bed and turns her back to me and goes to sleep, I’m curios , but tired anyway and drift off to sleep.

Morning arrives, a good morning kiss and cuddle , but an admission of guilt and a confession of what had occurred last night .

This is what I recall of what Linda had told me , some of it is known to me that Tanya is one of Linda’s part time staff , early 20s , engaged to be married with a very young child .
The following is what her memory of the events were

“ after the nightclub we went back to Tanya’s as always for a nightcap, Scott had been babysitting their little boy , and was still up watching Tv . Tanya poured us a large vodka and sat beside Scott on the sofa, as I sat on the comfy armchair some 6feet away from them .
Soon , because of the alcohol kicking in , they begin to smooch on the sofa . “ time for me to leave “ I say , but I’m met with a glare and an order that I should do no such thing.
Then Tanya , in her drunken state says that Scott has always fancied a threesome ??
“ well that’s not happening “ I said and went to leave ,
Only joking , said Tanya , and went and got me another vodka ,
Things quietened down, but soon they started smooching again , Tanya had on a full length pale blue shoulderless dress, and Scott pulled the top down to reveal her small , yet very pert tits , and started kissing them , both of them all the while staring at me .
Clearly, Scott whispered something to Tanya ,
Scott wants to see your tits Linda ,
I laughed nervously and refused
“ oh come on, even I want to see your tits “ said Tanya
, now , I had a white T shirt on , without a bra , so , just to keep things fun , I lifted my shirt and flashed my tits to them .
They both laughed, and claimed how lovey they looked .
They then both stood up with Scott standing behind Tanya and nuzzling at her neck , before unzipping her dress and letting it drop at her feet , leaving her standing in front of me with only her black lace panties and high heels . I have to admit that at this point I felt slightly aroused and uncomfortable at the same time,
Time for me to go , I said ,
“ don’t dare go now “ said Tanya
Scott cupped Tanya’s tits and continued nuzzling her neck which was obviously having the desired effect on her as she had her eyes closed and was moaning softly .
Scott then kneeled down behind her and slowly pulled her panties down . Now , I always thought that young girls these days were shaven and bald , but Tanya had a thick bush of pubic hair . The sight of this happening only feet from me certainly had me uncomfortably aroused and I had trouble keeping control of my emotions.
Scott then ran his fingers around from behind Tanya and started playing with her pussy ,, whispering again into her ear ,
“ what colour of panties you have on “ said Tanya ,
“ white “ I replied , knowing I’d given this information far too freely ,
“ show us “ came her response.
I sat there uneasily on the armchair , pausing , feeling ashamed but so fucking aroused at the same time. I lifted my left leg up onto the armchair and leg my long flowing skirt ride up above my knee, at the same time allowing them to see my white thong . Here’s me in my forties allowing the both of them to look up my skirt , both of them half my age .
This clearly gave them such a turn on and Scott’s fingers danced into Tanya’s pussy and she came very quickly, releasing a few gutteral comments in the process
I wish I could have left at that point, but I was helplessly under the spell of sexual desire
Tanya then came , and ordered me out of the chair and stood behind me .
Scott took his place on the sofa , still in the t shirt and jogging pants he’d had on since we arrived.
Tanya stood behind me , whispered in my ear that Scott wanted to see my tits ,I was by this time very aroused , and under their control, as Tanya lifted my t shirt up to expose my tits to her fiancé , . He immediately started stroking his cock inside his jogging pants
Oh fuck I was so excited I could barely stand up at this point
Tanya then knelt behind me and unzipped my skirt, letting it fall to my feet .
I’m now standing there in front of Scott naked apart from my white thong which I know must be showing damp as I’m absolutely soaking wet in arousal
Tanya whispers again. “ do you want to see his cock ?? “
I couldn’t speak, my mouth was so dry , I was so excited,
“ I said , do you want to see his cock “ she reiterated,
“ yes please “
Scott stood up , pulling his joggers down , revealing a huge cock , bigger than yours my darling , and absolutely fully erect , magnificent
Tanya knelt behind me and pulled my thong off , her fingers expertly stroking my clit , It was like I was in a dream , she had me on the cusp of exploding
Scott was stroking his cock just a couple of feet away from me , and I so wanted to feel it , taste it
“ Scott wants to fuck you Linda “
Tanya’s words came like a steam train to my brain and my knees buckled as she fingered my clit expertly and I gave in and squirted my come all over her hands , I couldn’t contain myself,
Simultaneously, Scott shuddered and shot a stream of cum into the air at the sight ,
Nothing was spoken after , and I sheepishly left to come home , I hope you forgive me ?

I said nothing , got up , went to bathroom,, I was so fucking horny , it only took half a dozen strokes to shoot a mountain of cum all over the mirror
Obviously, there was some major discussion to be had before the next monthly outing
More on that if this is acceptable
It’s very interesting