seriously, let her tag along for a while.
like erik said make sure the situation is controlled at all times.
One of my roommates in college developed a crush on one of my climbing partners so she decided she simply must learn to climb. What a nightmare. Prior to this her sole athletic endeavor was waxing her old mustang.
She stuck w/it just long enough to spend a night w/my climbing partner. Being true to form, that's all there was.
He didn't call, she was bummed. It quickly put an end to her climbing before anyone got hurt.
Let her find some guy at the crags, that'll cure her