For insurance money?
I think he wanted the loser son dead to avoid a hefty wrongful death lawsuit. They can sue the son’s estate but it’s doubtful he had much on his own. Not sure why he wanted his wife dead except maybe she would know he was responsible, so just get rid of both thorns.
My only question is who killed the gay toy boy and why?
My made for TV theory is that the younger son was a burgeoning serial killer of sorts. He killed his brother’s boyfriend out of spite, pushed the housekeeper down the stairs because she knew something or he thought she did.
Mommy helps him cover up and the final straw for dad is the girl killed in the drunken boating accident that can’t be covered up because it was too public and is wrecking the family reputation and finances. So dad takes steps and it’s starting to unravel.
+1