My wife was all big time (Cherohala, Dragon, Wolfgang Puck, two drops, 3 bikes) until we rode up Blood Mtn. in a driving lightning/rain storm in darkness this last May. Now she is really, really big time!
In the words of FriarJohn, "well, that was interesting." Will never forget that line or that guy.
Morale of the story is, start slowly and work your way up. My wife avoided riding for the first 10 years of our marriage and has now been riding eagerly for the past 6.. It is a hoot...