V.C. Andrews 
Forbidden Heart 

The Forbidden series continues in this thrilling e-novella, as Emmie must reinvent herself in Paris after her older sister, a high-priced escort, suddenly disappears.Emmie risked everything to track down her long-lost older sister, only to be left behind in Paris after Roxy finds love and escapes from her life as a high-class escort. Now in the care of her uncle, Emmie is wise beyond her years but adrift without her sister. When she meets a charming and seductive young French man, she must remember all of Roxys lessons on love and sex to make sure she doesnt go too far too soon