[hotrodsally]

Depending on where you live (CC and Rs, municipal and county codes, etc) a make-shift fence with a tarp may not be much of an option and a "real" fence can cost some serious $$. You may want to consider greenery (trees and bushes) to create a privacy wall.

Another thing to consider is to make her your friend. The next time you have a small group of friends over for a BBQ or a similar event, invite her over. It will give her a chance to get acquainted with you (and vice-versa) and satisfy her curiousity. She may just be lonely.

Even if you'll never be "friends" in the strictest sense, it's always good to be on friendly terms with your neighbors; you never know when you'll need them.

Good luck.