Teenage girl hasn't left her house since she was born?
Reminds me of a girl I dated shortly after high school. She was 17 years old (I was 18, and only about 6 months older than she was) and she had never been further than five miles from her house in her entire life. Took her on a date to a nearby town, we got about 10 miles down the road, she started having a panic attack. Furthest she'd ever been from her house in her life. Had to turn around and take her back home.
Relationship didn't last much longer after that.