So she's mature enough to deal with a movie where millions of people are killed, a movie about a retarded man trying to raise a daughter, 2 different movies in which she is kidnapped for money (1 of which involves her bodyguard going on a killing spree in order to find her), and I won't even begin to get into the bullshit that went on in 'Hide and Seek'.
To me all of those issues are as complex, if not more complex, than child abuse. It's just the 'taboo' nature of sex that makes it seem all that more serious.
She seems like a very intelligent, very mature young actress. If she doesn't have a problem with it, than neither should we.