>> no, it didn't. because i had never seen her come home like that. and she couldn't tell me what had happened. >> reporter: she smell like alcohol? >> no, she didn't. that was -- that was the scary part to me that, you know, that she did not smell like alcohol, yet something was wrong with her. >> reporter: even more alarming, mary later realized cathy's underwear was missing. what you're describing is what happens when people come home after they've been date raped. >> well, yes. >> reporter: you know, they can't remember what happened. they're maybe not wearing all their clothes and they are clearly under the influence of something. >> well, yes. i was afraid that maybe that had happened to her. but i didn't know for a fact. >> reporter: and she had no memory? >> and she had no memory. >> reporter: you think about