Vicky Pattison explores the double lives, mental trickery and manipulation involved with real life cheaters and their love lives.Have you been love bombed? Tell us your story at lovebombed@bbc.co.uk.Online Producer: Rachael Smith. Executive Producer: Kathryn Morrison.
http://www.bbc.co.uk/programmes/p0f1rkfw
3. Late night online
Alex and Sarah get more intimate sharing sexy images, they also make birthday plans for Alex's 12-year-old daughter, Cassie.
With insights from forensic linguist and criminologist Dr Elisabeth Carter of Kingston University.