There's a Dutch weekly magazine called REVU.
In the new issue nr.8 of 23 February until 1 March 2011 there is a topic about prostitutes who also work als porn stars and vise versa. The article is called: "Pornoactrices op bestelling" [porn actresses on delivery] written by Nikki Sterkenburg with the support of Casper Sikkema.
Anyway, the journalist(s) trie(d) to call some of these actresses.
A quote (translated from Dutch):
She [an English former porn star] works as a prostitute indeed, but says with a shameful tone: 'I'm sorry, I'm not willing to talk about it. 'Nothing ever changes.
And other actresses are not willing to talk either, or they must first propose it to their boyfriend who is listening with them on the telephone. One of the girls from a film of Kim Holland says after her boyfriend suggests something inaudible in her ears: 'No sorry, I'm not allowed to talk about it'