I was telling someone here earlier that I have never like the whole, "Well... she signed up for the show and knew what she was getting into..." sort of mentality. But I have to say... Chantal signed up for the show. She'd watch the series before. She knew what she was getting into. She's a big girl and if she really has a problem with then she needs to put her big-girl panties on and move on with her life. And, I can assure you she has done just that. She is not one to sit around and mope.
Brad would not have been allowed to tell her the truth. He is contractually not obligated to. It's that simple.