Is it really that hard to understand how she feels?
She lives at odds with her parents, who as loving as they are want her to live in a particular way. She on the otherhand has fully embraced western culture, but don't want her parents to find out what a sexually liberated and forward thinking woman she is - because she knows it would disappoint her parents. Now, if her parents were crap towards here, she wouldn't care what their reaction to her way of living would be but since they've been so nice to her she can't help to feel guilty.
Learn empathy.