I have always enjoyed playing in my wifes undies, she doesn't know but it gets me so horny and hard!. It was a normal saturday morning, Pamela got up early to go shopping after a little while, I was up and in her panties. decided to put a black see thru g string, together with a basque and black stockings.I felt very sexy.Suddenly there was a loud knocking at the door, fearing it was Pam, I looked out the window, it was the postman. I grrabbed my dressing gown and quickly ran downstairs. I opened the door, sorry to wake you he said, but need to sign for this.I took the parcel and his pad but the pen wouldn't write, I looked up and he was staring at my legs. i had forgotten how short my dressing gown was. I moved back into the hallway to get another pen. When I turned around, he was right behind me and the front door was shut.Whose a naughty boy then he said with a sly smile on his face. I was dumbstruck, didn't know what to do or say. It can be our secret he said if you are kind to me.I was shaking from a mixture of fear and excitement.Don't worry just follow my instructions he said, do you understand, I just nodded. Good boy he said. Right first of all lets get you out of that gown, you must be hot, mmmm very nice he said as I let the gown fall to the floor. He reached down and held my bulge mm nice he said.It was the first time a man had ever touched me, nice if I am honest. Now down on your knees my little bitch he said I was now staring at his crotch, well he ordered get started on the zip, you know what I want! I said I can't do it, he merely smiled and said what would your wife say about her undies. I started to unzip him mmm he said nice and slow, don't want to rush do we.I pulled his trousers down and was surprised at the bulge in his boxers. I put my hands on the top and slowly pulled them down, his cock popped out, it was about 6.5 inches long cut but seemed very fat.He had very large balls.Ok my man slowly start kissing and sucking and cup my balls in your hands. I couldn't believe that I was giving a guy a BJ. He put his hands around my hand and began thrusting inot my mouth, I thought I would choke but I was starting to enjoy the act.It was wasn't long before his thrusts got faster and suddenly he started to quiver and shouted OH Fuck,I susuddenly felt the hot rush of his cum, it seemed like pints, I had no choice but to swallow it up. mmmm good boy he said. Now remember this is our little secret he said as he pulled his trousers up. I was about to get of my knees, not yet he said, lie down. As I did he took a couple of snaps on his mobile, I protested. Just insurance he said. Now remember when I call again, you know how i want you dressed. MMM He said I have friend I might bring next time. As he left he waved his phone at me. I am nervously awaiitng the next time a parcel is due at our house.