My wife is constantly stressed out – whether it's about the kids, or housework, or her work, or our bills, or her parents, or my parents, or our friends, or our sex life, she is always on edge at any moment. I am the complete opposite. I try to live as stress-free as I can. I don't over-commit. I know how and when to say no. I don't sweat the small stuff. But lately her stress is starting to stress me out. I have been trying to lead by example, but she isn't following. What can I do?