I saw that too, mystery and it's made me wonder if there is an estrangement.
Michael is very conservative and I don't believe his siblings are so perhaps that accounts for an "apartness" I saw as they approached the coffin.
It's difficult to tell about Ron Junior. He has lashed out at Pres Bush and a few years ago did the same to Clinton. Seems odd that they can't close the gap at this time but there are no perfect families.