I don't know if this could be possible...just trying to figure something out like everyone else... but...
Could MD have been involved with a terrorist group in any way, and the funds were being sent to fund that? Could he have been leaving her, and truly did send the money, and use her casino card to point the FBI at her for the terrorist connection? I don't know.
I keep thinking there's some money laundry, gun selling...something we don't know about that enabled him to have that lifestyle. Something threatened the life he knew. Maybe that failed lawsuit for falling. He could have been losing more than winning lately, and while maybe not as financially strapped as some of us are, if others in the family are dependent on his money to survive, and he has this status with the family of being a multimillionaire ... it would crush his image. He wouldn't be able to support his mother, brother, ladyfriend and whoever else. I would imagine falling from that tall horse would be a hard fall.
That makes me go hmmmmmmmmmmm.