Then let me rewrite my post and say "when it comes to Rihanna".
Her relationships always end up the other person talking trash about her, but that didn't happen when she was with Matt Kemp because I think their thing wasn't that serious.
I think I read somewhere that she was just having fun with him, and she was trying to forget about Chris because when you think about it their relationship was Rih's first after Chris, and obviously she wasn't looking for love at that time.