While there is the urge to "share," for any number of reasons, it's just too risky with a co-worker. And I think this is true regardless of where you are, at work, or at a bar or a party. She might share your lifestyle, she might be sympathetic, but you know nothing about her or how reliable she is. If she can make this comment to you without knowing your situation, how can you know she won't gossip or share your information with others? I would never take that risk.