Not quite the same, but I regularly see a fairly well known porn star doing her weekly food shop, usually somewhere around the cereals in our local supermarket. Believe me, the plummy posh accent she uses in her films is not her natural voice.......:-)
She did or does fuck punters for cash though, discussed on here I believe. The milf that is Holly Kiss. Which strangely, according to an email exchange I had with her, she doesn't do. Kiss that is. £200 an hour she quoted me, I didn't bother in the end.