Anybody know the name of this movie with claire danes?!

i know it has claire danes in it!. i think it used to be on HBO when i was little!. i remember Claire Danes like leaving her house and meeting this guy (think he was a cop) and like having sex with him in the field behind her house, and i think she had a younger sister, and a not so good family life they were poor!.!.!.

anybody know!?Www@Enter-QA@Com

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