Jordan had nothing to gain here, other than to blast his brother. Jordan did a douche move there, I'm not saying Aaron isn't a douche, but we KNOW Jordan acts like one. You do not make family stuff public. The guy just gave one million dollars away. How do we know Aaron didn't contact his parents? How do we know the parents didn't message Aaron saying 'no worries, we are safe'. We also don't know the story behind the rift. All we know is they disapprove of the way Aaron is living his life. And if I were to speculate here, I believe it's because he's sexually active outside of wedlock and they are not shy about their disapproval. His parents are very religious.
The part about Aaron calling his grandfather before every game, and then not attending the funeral, if that were true, that's something I just don't know how to fathom. Then again, I'm not in that family and I've seen enough odd shit in my own family to realize ... some crazy odd ball shit happens.