A couple of years ago I strayed on my marriage with a married woman. I was driving down the road into the city when I saw this lady flagging me down for a lift. I never gave it any second thought so I asked her to hop in and we were on our way.
A couple of minutes of idle chit chat about nothing really I then asked her where she was going alone. She said she was going into town to meet a friend for a movie. I asked her whether  the friend was her boyfriend and that is when she mentioned that her husband was away in Australia for six months and he had been gone for four months.
There was some sadness in her voice and I told her I felt for her. She started to be emotional and all thanking me for understanding what she was going through. I just said it was cool, dropped the subject and then enquired about her friend whom she said was her BFF from way back.
We continued with our chit chatting on other random subjects and when I got to where I was supposed to drop her off, her friend had not arrived yet so she asked me to wait with her until she arrived.  I was not rushing anywhere really  so I waited a little longer and somehow the subject drifted to sex. I mentioned that she must miss her hubby so much and commented that women were stronger in being able to go for months without having sex and not missing it.
She said she missed her husband and that the past few months had been really unbearable. She said she had thought about cheating on more than one occasion but had not gone through with it. I complimented her on her strength and asked her to keep it up. She said I was such a cool guy, any other guy would have jumped on the occasion to service a starving girl!
I do not what came to me then, I immediately had a hard on. We had not even told each other our names and she said we could have one steamy session and not talk about it to any one. No names, no phone numbers to exchange! What a deal. It was unebelievable luck, I always wanted some anonymous sex. So she quickly sent a text to her friend saying that she was canceling on the movie date because something had come up. It was getting a bit dark and there is a huge park to the east of our city where people can go to relax and the like. We drove to that park, I parked the car in some quite corner of the park and we all jumped to the back seat of the car in a flash.
It was a bit spacious; we were kissing and it was clear she was wet already and my boner was hurting. I 2-fingered her pussy a little bit and her juices were flowing onto my fingers. She was kissing me passionately and giving me a hand job at the same time. Then I took off her panties and she asked me to fuck her right then. I lowered my hard dick onto her pussy lips and teased her a little and she grabbed the dick from my hand and shoved it into her pussy quickly. I immediately started pumping fast and she was clearly enjoying herself. I could feel her wetness on my dick. Later she asked if she could get on top and she lowered herself onto my rock hard dick and when I completely entered her she started kissing me again. I played with her tits and she was clearly enjoying herself. She was invoking the name of our lord and stuff, I liked those pleasant sounds that she was making a lot.
She then asked to be fucked from behind;  it was a bit awkward because of space limitations but I managed to enter her and her hands were firm on my butt for a while as  I cupped and played with her firm breasts. Later she was on all fours,  her ass  up in the air and  that angle was very arousing for me, I increased my pumping action and she came. She asked me to stop for a few minutes so she could catch her breath.
I loved playing with her tits as we paused on the fucking. She then asked to be fucked again doggie style  and she was making all these nice sounds and then she went quite. But she asked me not to stop, she then lowered her whole body and I was now laying lightly on top of her, but still deep inside her from the back. She was pushing her ass onto me and we developed an awesome rhythm. She came again, and she was panting heavily. 
This was a huge turn on for me too,I could not hold on any longer so I pulled out my dick and splashed lots of cum all over her round ass. What a load! 
We chit chatted a bit, then got fully dressed. She opened the cars glove compartment, found a pen and a piece of paper and wrote something. She then kissed me on the lips for about 2 minutes, opened the door and disappeared into the darkness
After she had left, I looked long and hard at the piece of paper, smiled, tore  it, threw it out and drove home. She had written " BEST SEX EVER- STRANGER"