I think its very unlikely it will ever get out that you did some escorting for such a short time. Most of these guys will delete the email/forget about the email, if they are on his mailing list they will have got lots of them, and very unlikely will remember you, I bet lots and lots of pictures are sent to their inbox every month.
I saw a picture of a very famous model on the website of a very upmarket central London escort agency, there was no way this model would be working for them, she was in a high profile TV ad campaign at the time for a well known high street fashion store, so they obviously stole the photo, thinking they could trick the men booking her into seeing a similar looking girl, and this is probably what people would think if they saw your pictures connected with escorting. If anyone ever did confront you, just say someone stole your pictures, lets face it, this happens all the time. You would defiantly be believed.