Karen roe is a character from the teen drama one tree hill. She is a single mother to Lucas Scott and a step mom to Nathan Scott .she is also a successful business woman who owns Karen Café and the TRIC nightclub , Karen is a mother figure to Brooke and Haley and she becomes close friends to Deb Scott after her marriage to Dan falls apart . Karen has a complicated relationship with Dan's older brother Keith Scott,who helps raise her son Lucas and father's her daughter Lily roe