hannah mcwhirter , 21 , of banff , aberdeenshire , engaged in the ménage with a co-worker and her husband shaun in july 2013 .
she even exchanged texts with the couple after their threesome telling them how much she enjoyed herself .
but when mr clark told the john lewis department store worker 's boyfriend about their hookup she claimed she had been raped .
mcwhirter 's boyfriend was on a night out , oblivious to what was going on .