Note: series 2 finale spoilers ahead!
When Stella finally finds Rose in the series finale of The Fall, the medical examiners reveal that she has carved I Love Yu (I will assume it is supposed to be I Love You) into her left arm.
Image of Rose's arm (warning: graphic!)
Why? Is this an act against Paul, to anger him? A final message to her husband and children?
The only context I can recall is her taped saying, "I have loved and I am loved and you can't take that away from me!" to her abductor, Paul.