I arrived in from work and my wife Vicki was upstairs getting dressed when she shouted "hurry and get in the shower we are due at our friends for tea in an hour".
I showered quickly and got dressed then we got in the car and started to drive to our friends house. When we arrived the kids were playing and our friends were preparing the meal.  It was not long before we ate our meal and we all were talking in the sitting room while the kids played a game on the floor.  Vicki got down on the floor to play with the kids while we all carried on talking.

After a while I noticed that my wife's top button on her blouse had come open and was exposing her cleavage and you could see the top of her lacey black bra.  I  wasn't the only one to notice as I could see Simon trying to have a crafty peak but it was a bit hard from where he was sitting.  After a while Simon put the kids to bed, and my wife and her friend were getting through the bottles of wine as it was my turn to drive.
We were laughing and joking and my wife was sitting on the floor between my legs when I realised that Simon was now sitting where he could get a right good view down at my Vicki's nice big 38f tits(she has a cracking pair of tits with great nipples).
A while later I could see Simon now had a bulge in his pants and when I looked over at where his eyes were looking they were aimed right at my wife's tits,  then he said he needed the bathroom and was gone a little while.  He had obviously gone to wank himself over my wife's tits(she had commented to me in the past that she had caught him ogling her tits but I had never seen it for myself) My wife was getting a bit sloshed and said we should get going home as it was getting late. 
We started to drive home and had gone a little way when we had to stop at the traffic lights, when we tried to pull off from the lights there was a loud twanging noise and the car wouldn't go anywhere, "shit that's all we need"  Vicki said.  "Its ok i will call the breakdown service on my mobile"  I replied.  The lady on the phone assured us someone would get to us within half hour so me and Vicki  started chatting between us.  I asked her if she noticed Simon was staring at her tits  all night to which she replied  "of course i did " , "did you think the top button of my blouse came open all on its own " she laughed " feel between my legs" ,  I put my hands between her legs and felt how wet she was through her black satin knickers.
Here was my wife getting off on the fact she had knowingly teased another man by showing as much of her big tits as possible and making his cock hard.
I was just rubbing her pussy through her knickers when a set of head lights appeared in the distance , my wife straightened herself up as it was the breakdown truck .  It pulled up in front of us and out got 2 men ,one was small and stocky and the other was a tall black man . The small stocky one introduced himself as Colin and said his mate was called Wes and asked what was wrong , so we explained what had happened and he asked us to pop the bonnet sat in the drivers seat and started the car while Wes stuck his head under the bonnett , within seconds they said the clutch cable had snapped and they would have to tow us home . We got in the back seat of the truck as the lads hooked the car onto the back of the truck and then we were on our way home.
After a few miles I noticed Wes had nodded off in the front passenger seat and every now and then I could see Colin arching his neck to look in his mirror . I then realised he was trying to get a good look at Vickis big tits. I gave her a nudge and whispered to her what Colin was trying to do, and with that she adjusted herself and put her head on my shoulder . I then realised what the little minx had done , she had positioned herself so that her blouse had fallen open a little so Colin now had a really good view . I know Vicki was getting turned on as her nipples were hard and poking through her blouse.
When we pulled up outside our house I asked the lads if they wanted a cup of coffee before they got off ,  to which Wes replied  "I could murder one cheers" . Vicki gave me that look you know the one you get when you have said something they didn't want you to say and made her excuses that she needed to get changed as she had somehow got a bit of oil on her blouse , and with that disappeared upstairs.
I gave the lads their coffee and we just chatted a while about things in general, then Wes asked if he could use the bathroom, "its the first door on the left at the top of the stairs" I replied and off he went. He was gone a little while so I started to go upstairs to see if everything was ok (as the bathroom lock has a tendency to stick from time to time)As I got half way up the stairs I could see Wes looking through the crack in our bedroom door which was the door right next to the bathroom door and could see him rubbing himself up so I started to go up the rest of the stairs a bit more noisily to make sure he heard me. He made out he was just on his way down and with that disappeared downstairs.
When he had gone down I looked through the crack in our bedroom door to see what he was looking at and to my astonishment there was my wife playing with herself so I left her to it and went downstairs with the attention of getting rid of the lads.
As I got downstairs and entered the room Wes was obviously telling Colin what he had just seen because it fell silent as soon as I opened the door . They finished their coffees and then Colin decided he needed the bathroom , so me and Wes chatted for a while . After about 10 mins I decided to go see where Colin was . As I got upstairs I realised Colin wasn't in the bathroom so I looked through crack in our bedroom door and the vision that met me made my cock spring to attention . There was my wife sat on the edge of our bed in her dressing gown with Colins cock in her hand and she was licking it and sucking it(oh my god i had mentioned in the past that i would love to see her pleasuring another man and she just laughed it off yet here she was making my fantasy come true).
I watched for a while, she was now sucking his cock for all its worth(and she certainly knows how to suck cock well) . Colin then opened her dressing gown and his jaw dropped as she was wearing a black lacey bra with matching silky knickers and she had put on hold up stockings (which she later told me  was for my benefit after the lads had gone but I had my doubts) . Colins  muttered  "oh my god i could see you had a good set of tits but didn't dream they were this big" .
" Would you like me to wank you off with them "  she asked Colin . He needed no invitation and whipped off her bra and released her big tits . He just stood there gazing at her tits and her big erect nipples , so Vicki positioned his cock between her tits and squeezed them together and slowly moved them up and down . Colin was moaning " mmmmmm that feels good " she started to wank him faster and faster until he shot his load all over her tits.
He then pushed her back onto the bed and started to rub her pussy over the top of her knickers then he put his hand up the leg of her knickers and I could see him start to rub her clit.
This drives Vicki crazy as she loves nothing better than having her clit rubbed .