In 2018, Katie begins dating Thorne Forrester, her sister Brooke's ex-husband and brother of her own former fiancé, Ridge. Thorne convinces Katie to go after full custody of her son with Bill, given that Bill had neglected to spend time with little Will as of late. To secure Katie's chances, Thorne and Katie get married. Full custody is awarded to Katie, but acrimony between the Forrester brothers and Bill ensues. A fight breaks out between Bill, Ridge and Thorne; Bill ends up falling over his house's balcony and is currently in a coma.