The other day I went to my local charity shop to see if they had any dinner jackets and trousers for a dance I was hoping to go to.I was looking through the suits on the rail when I noticed a very attractive woman in her late 40s looking at dresses in another part of the shop,as I was looking at her she turned and seeing me looking,smiled.I smiled back and continued looking for a dinner jacket.As luck would have it,I found one that seemed to be my size,so I took it off the rail and asked the lady behind the till iff I could try it on.She said yes,and pointed to a curtained off area.I took the suit in and pulled the curtain shut and proceeded to take off my jeans.As I turned round after taking off my jeans I noticed that I hadn't pulled the curtains fully shut and that the attractive lady was stood outside holding a skirt.She seemed to be looking in through the gap,and this quite excited me so my cock started to go stiff in my boxers.I pulled on the trousers and they fitted but were a little snug,all this time the sexy woman was definately looking through the curtains so as I pulled the trousers down I 'accidentally' pulled my boxers down too,so my cock sprang out.The womans eyes nearly popped out of her head and she didn't stop staring at my,by now,rock hard cock which was sticking up at about 45 degrees.I realised that she was obviously enjoying it so I started to wank my cock while she watched and I noticed that she moved the skirt so it was in front of her and her other hand went behind the skirt.The dirty bitch was rubbing her pussy!This really turned me on so soon I was shooting my load into a hastily retreived hanky.I cleaned myself up and put my clothes back on and exited the changing room,exchanging smiles with the woman who entered behind me.She pulled the curtains shut,but like me,left a small gap so I turned round and pretended to want to try the suit on again.She undid her jeans and pulled them down revealing a lovely pair of white lacy knickers,which she then slowly slid off and placed on the chair with her jeans.She had a beautiful figure and her pussy was framed by neatly trimmed dark pubes with slightly parted pussy lips in the middle.She stood up,looked straight at me and placed one foot up on the chair and started to gently rub her clit,she did this for a couple of minutes before she shuddered and had a fantastic orgasm.Her pussy was very wet so she took the panties and wiped the juice from her legs and pubes and then placed them on the chair.She then winked at me,pulled on her jeans and left the changing room,leaving her damp knickers on the chair.I quickly entered the changing room,picked the sexy damp knickers up and lifted them to my nose to smell her musky odours.I saw her turn round,look at me, smile and mouth the word 'enjoy'.I put the panties in my pocket and took them home for a lovely long wank!