From behind

After a few weeks of building up the courage,I mentioned to my wife the idea of watching her having sex with another man.
I thought she may blow her stack when I said this, but although she seemed somewhat concerned about it, she didn't seem unduly bothered.
She didn't make any mention of it until a few weeks ago, when we were in bed.
"Why would you want to watch me with another man?"
"I don't know, there is just something very sexy about the thought of it"
"Fair comment, but what would you want to watch"
So I went onto to explain that I would want to see being taken from behind, preferably outside.
She seemed bemused by this. Telling her this made me get quite an impressive hard on, which would be fair to say she made full use of.
A couple of days later she told me she had been invited out to the leaving do of one of the guys she works with, and could I pick her up from the pub where the do was being held. I agreed to this and the time of collection was set for 10.30pm, and she would be waiting outside.
The evening of the do came, and my wife got a taxi to the pub which was about 10 miles away.
I stayed at home and got on with some work, until it was time to collect her. I set off and arrived at dead on 10.30.
No wife, which was a bit odd. So I gave it 5 minutes and went in to find her. I saw some of her work mates, and asked if she was there.
They replied that she had left 5 minutes ago with one of the guys who was the designated driver, who was going to give her a lift home.
I guessed she had probably been drinking and had forgotten. I asked where his car was to try and stop him so as not to have a wasted journey, and was told it was parked round the back of the pub.
I thanked them, and went out to go to the car park.
As I walked round, I could hear noises coming from just round the corner.
I recognised my wifes voice saying "Go on, put your fingers in"
A male voice replied "What if we get seen?"
She replied "Who cares, just do it"
I then heard her gasp.
I moved round, staying in the shadows, and got a clear view of my wife leant against a wall, her skirt round her waist, with some guy kissing her hard with his hand in knickers frantically fingering her,
He took his mouth away from her, and said " I really want to fuck you"
" Don't tell me what you want to do, just do it"
"But I haven't got a condom"
"Don't bother, I'm on the pill, just do me"
With that he pulled her away from the wall and pushed her towards the front of a nearby car.
He pushed her face down onto the bonnet and lifted up her skirt that had slipped down.
My wife shifted her feet apart and said " get my panties off"
He took hold of her knickers and went to pull them down, but couldn't get them very far down her thighs, so he ripped one side of them and the tattered piece of underwear slid down her leg and settled at her feet.
I realised that what I had wanted was now reality, but I didn't want it to stop.
The guy then undid his jeans and slid them down a little and took out a huge hard on.
He took hold of my wife's hips and pulled himself into her.
She gasped, and I watched as she started to bite her lower lip.
He started to push into her with long hard thrusts; each time he went in she gave a little gasp and gradually her moans got faster.
I knew she was reaching the point of orgasm, and she reached it, but instead of the cry she usually lets out, she put her hand across her mouth and stiffled it.
Her head dropped a little, but still the guy continued to pump her hard.
She then said "take it out and put it up my arse"
"You what?" came the reply. I then realised that this guy had a huge cock to compensate for not much brain.
"Take your fucking prick out and fuck my arse, I want you to fuck my arse until you cum, are you thick or something?"
She then reached round and guided his prick upto her arse, and pulled the tip in.
He then put his entire length up her tight hole with one push.
I watched her as she gripped the top of the car bonnet, as he started he pumpimg again.
It didn't take long for him to come; he seemed to go on for ages, and as he pulled out, a couple of jets of cum shot over my wife's buttocks and hoisted up skirt.
"Have you finished?" she asked
"yeah"
"Good, now sod off. Don't you dare tell anyone about this"
He zipped himself up and went back inside. She stood up, pulled down her skirt, took the remains of her knickers off her foot and went back inside.
I stood in shock. I had just seen my wife being banged over the front of a car, and I hadn't done anything.
A couple of minutes later my mobile rang. It was my wife.
" Hi darling sorry about being late, I got a bit carried away.I'll meet you out the front"
I quickly walked round to the where I had left my car, got in and seconds later, out comes my wife, looking like butter wouldn't melt.
She got in and off we went.
"Did you have a good time?"
"yeah, it was ok"
She started to chatter on about her work mates, when I decided to mention what I had seen.
She went quiet, and I pulled the car over into a layby and got out.
She got out and said "Oh God, are you pissed off?"
"Not at all, I'm horny as hell"
With that I walked up to her, turned her around and bent her over so she had her hands on the passenger seat.
I lifted her skirt, and put my hand between her legs and felt how wet she still was. I then felt between the cheeks of her arse and could feel the slippereness of the other guys spunk around her arse.
I took my cock out of my trousers and without any finesse pushed it into her slippery but tight bumhole. I didn't care if she came, I just wanted to add my spunk to his.
I banged away until I shot my load up her, pulled out, pulled her skirt down and got back into the car.
As I got in, I could see she had a very satisfied look on her face.

Since then, she has had a threesome with the guy from work and one of his mates, while I sat and watched as they had her several times taking it in turns to fuck her fanny then her arse finishing off with a double penetration.
The next plan is for her to be gangbanged by the 'thick' guy and a few more of his mates.She wants all 5 of them to take her up the arse one after the other, again while I watch.
Who can complain at that?