In January 2017, Rhona and Pierce's relationship takes a sinister turn when Pierce forces himself on Rhona. After this, Rhona is left in a state of confusion and probable shock, suggesting Rhona did not give her explicit consent. A month later, despite Pierce forcing himself on her for a second time, she agrees to marry him on Valentine's Day, although she has shared a kiss with Paddy. Pierce overhears Rhona and Paddy discussing the kiss, unaware that Pierce has overheard; On her wedding day, Paddy gives Rhona his mother's necklace and she and Pierce marry. Pierce shows Rhona information of a Lake District veterinary practice lease, but Rhona is surprised he acquired it without discussion and, when Pierce suggests Rhona is not over Paddy, Rhona admits she drunkenly kissed Paddy. He insults her so she attempts to flee the house, however, Pierce drags her back in the house and jealously rips the necklace off. Losing control, Pierce pushes Rhona to the floor and proceeds to rape her. He attempts to shift the blame onto Rhona but, under pretence of showering, a shocked Rhona escapes the house, goes to the police station and reports her rape. Rhona is taken to a Sexual Assault Referral Centre, where she is examined. Rhona leaves during the interview and orders Pierce to get out or she'll phone the police. Rhona almost confides in Marlon, later, after putting Leo to bed, she breaks down on the stairs. Pierce tells her things will be worse if she does tell the police.