A man believes he ruined his twin sister's shot at love by revealing her fiancé's bad behavior.He asked Reddit's "Am I the A******" forum if he made the right move.The twin sister's fiancé routinely made fun of the Reddit poster's body.The fiancé was always sure to do it when she wasn't around and the Reddit poster tried to tolerate it out of love for his sister.But during the bachelor party, the Redditor finally stood up to his sister's fiancé and later told his sister everything.Reddit thought the brother did the right thing