As I was leaving the MILF was sitting by the counter. She handed me a business card and said come back again. It was pretty clear to me that she didn't expect money that I paid upfront to the younger one when I arrived (was $100 as I recall - was maybe 5 years ago). Anyway I put the card in my wallet and took out a 20 (yup a 20 - I'm the last of the big time spenders) and gave it to her. By the smile on her face she wasn't expecting it.