Rachel Cusk 
The Temporary 

When one of corporate London's transient typists unexpectedly crosses Ralph Loman's path, her disruptive beauty ignites a brief blaze of excitement in his troubled heart. But Francine Snaith is ravenous for attention, driven by a thirst for conquest, and when Ralph tries politely to extricate himself he finds he is bound in chains of consequence from which it seems there is no escape.