Don't have much time to explain so I'll explain later, but I have a theory as to why Rain believes wholeheartedly he is the rightful heir after Kitana.
His mother was not a commoner, she was Gerrod's blood sister. Not sure if he or Kitana are older, but it explains why he says it more openly now and claims Sindel is a deceiver. Again I'll explain either tonight or tomorrow with more detail, about to get to work. @the-axe-lass @toomanyf4ndoms7 @bisexualjohnnycage @kaballinx