Portia Da Costa 
Hotbed 

How the other half live…Natalie and Patti are two sisters as opposite as can be. While Patti has been voraciously bedding a whole host of hunks, for shy and retiring Natalie, an illicit liaison is something she can only dream of…That is until she gives in to temptation and initiates a sexy encounter on a train with a complete stranger. Enamoured by the thrill of the chase, she opens herself up to a whole new world of seduction…From the Sunday Times bestselling author of In Too Deep