 In 1982, Bobby and Pam adopted a boy named Christopher (Joshua Harris, originally Eric Farlow), who was the biological son of J.R.'s deceased sister-in-law, Kristin Shepard (Mary Crosby).Pam had always wanted a child but was unlikely to be able to have one of her own.Bobby's sister-in-law, Katherine Wentworth (Morgan Brittany), later had an unrequited crush on Bobby and began to become obsessed with him.