Changing Room

This happened 2 years ago by a accident i came home and walked in on my son nude in our kitchen,my eyes quickly found his cock which left me speechless when it got rock hard,it took a few days for me to talk to him about it,it felt strange but in a good way when he said it's wasn't the first time it's happened,that day i got him to come shopping with me i picked out some clothes for me and him to try on it came to me to blow his mind, while he was in the changing room next to mine i left mine and went into his to get him to zip up the dress i picked out,I couldn't see he was starting to like what he was seeing and when he asked me to turn round i let the dress fall off and stood naked Infront of him,I went that far and wasn't leaving until he had me in that changing room,his cock was desperately trying to get out,there was no stopping him it was something he's wanted and i pulled him down on top of me and he quickly found my pussy and started fucking me fast,I was disappointed when he started to cum and withdraw and finished off over the dress that i was laying on,I didn't buy the dress i put it back with his cum still on it,the sex has been great the last 2 years no sign of stopping.