I dialed the right number once to call my boyfriend and a woman answered. Very confusing (I knew he wasn't cheating and/or there wasn't a woman at that number). When I hung up and thought about it I just knew the number was right! But, after a moment I realized I'd called my dead grandmother's old phone number! That was a fun conversation to have with my T.
Having the right number and dialing it aren't necessarily the same thing. I could believe she left a message on some answering machine somewhere -- it just wasn't your nonexistant one