*NEW* 'Tangled Topic -- "My Brother's Keeper"

This week's 'Tangled Topic comes from Christina, 25, of St. Petersburg, FL who writes:

"I think I'm in love with my step brother! We've never done anything sexual and no moves have been made. But he's just so damned sexy. We knew each other growing up. After years apart, I see he's grown up and is fine as ever. What should I do?"

* 1. How should Christine handle this situation with her step brother, who is a "keeper?"