However, things began to change when a former boyfriend of Holly's, a film director and photographer named David Caplan, unexpectedly arrived for a visit. With some guidance from David, Rebecca began exploring her own interest in photography as well. After a series of events caused Rebecca to begin doubting what she knew about her paternity, she took a DNA test which revealed that David Caplan was her father, rather than William Walker. She confronted David, who told her that he did not previously know she was his daughter and would not have been a stable or reliable father if he had known. She did not immediately tell the Walkers that she was not related to them, but kept the test results to herself until after Justin revealed that he had some romantic feelings for her. She then confronted Holly, who called Rebecca ungrateful for all the sacrifices Holly had made for her and threw her out of the house. The Walkers learned that the "R" in the computer password had never stood for Rebecca at all, but for Ryan, a child William had with yet another mistress.