she just kind of fell in love from the get-go. >> i had one woman tell me that felix vail looked like he'd been kissed by heaven. he had this charismatic aura. >> reporter: funny thing about felix, though. >> i think felix was the bad boy. >> reporter: mary's friends say they didn't like him much. can't remember why. >> for some reason we didn't care for him. i do remember that. >> reporter: now in the fall of '62, after a year of marriage, mary and felix have a baby, billy, and some unexpected good news. >> reporter: and they thought, or she thought she was pregnant again? >> she did. she thought she was pregnant again, told her friends she thought she was pregnant. >> reporter: were they happy at the beginning, do you think? >> reporter: but behind those backyard smiles, something dark. one of her sorority sisters remembers a mysterious premonition. >> i remember in the dorm that mary had always told us she was going to die young by drowning. i never forgot that. >> reporter: one sunday evening, felix gets the notion to take mary fishing out on the river they stay out late past dark