Hard time remembering this horror/thriller

Hard time remembering a movie I saw a few years ago. All I can really recall is a girl answering some sort of ad for a photo shoot at a mansion.. and wearing a dress that was similar to another victim she found out about. She was locked in the basement of the mansion and either was being tortured and there was another girl in the basement as well being tortured. I want to say it was a mother controlling two boys that were doing the harm.. and she tried to escape. Can’t remember for the life of me what the movie was called.. I’ve been putting in key words for a plot in google search all day. Much thanks in advance

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