Sends all the wrong messages
Yes, I understand this is supposed to be a comedy. The laughs are very few and far between and major aspects of the plot simply don't make sense, but what really bothered me was the message.
The brother is portrayed as a nice guy. Are we really supposed to believe a nice guy like him wouldn't care that his fiance Joana had been a vicious and cruel bully in high school and didn't care that the primary victim was his own beloved sister Marni? Really? Or that he would be angry at Marni for informing him? Or for that matter, that he didn't know what she had gone though in the very same small town high school he attended with her for two years?
This is not a story about someone "moving on" from being bullied in high school. Clearly Marni had already moved on and made a successful life for herself when the story begins. It's a story about someone who was bullied relentlessly, had moved on with her life, learned her brother was marrying her tormentor who felt no remorse and continued to torment her while lying to the entire family about the kind of person she really was. Marni was prepared to forgive Joana if she would simply apologize, but instead Joana continued treating her with cruelty. The message of this ridiculous story is that Marni was the problem and that she needed to move on, not from being bullied in high school but from learning her brother's fiance was STILL a bully, not to mention a manipulative liar.
At the end of the story, somehow, magically, Marni "does the right thing" by forgiving Joana (who never apologizes and never seems to feel any remorse or regard for Marni's feelings) and they become friends. No, it doesn't make sense. If you like comedies that don't make sense and aren't funny, then this film is for you.