This happened to me two months ago.
I had to go to the doctor and was two hours late to work and had to make up the time. I was finished with everything and went onto this site and a few others. I was reading a story and got really into it and since no one was around I dropped my pants and underwear and start to slowly masturbate. I was getting close and my eyes were closed when I heard a moan.
I looked up and Samantha is watching me. I try to pick up my pants and she tells me not to. I start to say something but Sam says not to talk. She walks around my desk and tells me she hasn't seen a real one in a while. Sam takes off her jacket and sits in front of me and asks to touch my penis. I let her and she strokes me a few times and then leans in and starts to suck me off. I spread my legs onto the arm of the chair and let her go to town. I am moaning and grabbing her hair and tell her I am close.
Sam sucks harder and faster and I squirt my cum into her mouth. After a few minutes my dick gets smaller and it slides out of her mouth. Sam gets up and she tells me she really needed that. I ask if I could help her out and she smiles and takes off her dress and bra and panties. I first suck her breasts and then tell her to sit on the table. I open her legs and put them on my shoulders and go to town. Sam is pulling my hair and telling me where to lick.
After a few minutes I slide in a finger and lick her clit. Sam is bouncing around and after a few minutes she slams her legs together and screams yes. Sam asks me to stay the night at her place and we cuddle and fall asleep.