In Series 6, Mandy later begins a relationship with Joe Pritchard (Ben Batt), who begins to mentally abuse Mandy before starting to beat her. When this is revealed, Mandy's older brother Jamie Maguire (Aaron McCusker) brutally attacks Joe, with Mimi confessing to the attack in order for Jamie to remain out of prison. Frank and Jamie's wife, Karen (Rebecca Atkinson), desperately try and make Mandy see that what Joe is doing is wrong, with Mandy agreeing to end the relationship for Katie's sake. Unbeknownst to Mandy, but Karen has begun an affair with Joe. After Paddy is kidnapped and forced to take heroin by a woman named Maureen, she is still intent on revenge for Paddy getting her daughter hooked on drugs which eventually led to her death. Maureen contacts Mandy to come over to her house, where Mandy realizes who Maureen is and a physical scuffle ensues. Maureen then causes an explosion just as Paddy and Mickey Maguire (Ciarán Griffiths) arrive, instantly killing Mandy and Maureen. Katie is seen attending Mandy's funeral in Paddy and Mimi's care.