"What if I strangled him?" (1:45)
Katherine, 36, was rocking her baby son when she had terrifying visions of his death.
Katherine, 36, was a new mother terrified by the thoughts she was having. Once, she imagined smothering her son with a burp cloth. Then she saw herself drowning him in the bathtub. "I didn't give him another bath for a year," she says. "I made my husband do it."