Based on the format of the ad I'd say it looks like a fake to me.

Fog

http://dc.backpage.com/FemaleEscorts/new-mature-sultry-brunette-you-will-be-glad-you-picked-me-43/7762264

All fully clothed, and there is nothing in her ad that even hints that she does anything more than talk or go to a movie. "Oh., I don't do that, it's illegal, I am only a companion."  Maybe better to take out 7 $20 bills and light a match to them - you would save yourself $20

some of the pictures are of Angela Harrington on NBC's "Age of Love". Probably not all of  them, although they even steal her MySpace photo.

Cheers,

Miss Marple

Common Scamm - fake photos of a star or model - the hourly rate is the hook to get you to call - they press for your street address - a different girl shows up with her "driver" she demands cash or she and he will make a scene - once she gets your cash she runs off - don't fall for it.