Benjamin Ritchie, 35, met the 24-year-old woman/victim in a chat room on the dating website Badoo where he called himself Marina.
‘Marina’ told her that her husband was a serial adulterer and she needed help exposing his infidelity.
‘Marina’ asked the woman to go to their home while she was at work and videotape herself have sex with her ‘husband’.
His victim agreed to go along with the plan and had consensual sex with Ritchie at his home.
She then emailed the video to ‘Marina’ - believing she was helping a friend to expose her husband.
But then the pervert used footage of their romp to blackmail the terrified woman.
The victim received a message from ‘Marina’ saying if she did not continue to sleep with her ‘husband’ the sex tape would be sent to her family.
Under duress the terrified woman obeyed the commands and continued having sex with Ritchie for two months.
She eventually broke down and told her boss what had been happening - and he told her to call police.