Trust me. Smokey won't be very much involved in D12's life given his past actions, inability to even interact with them at the human level, and the physical distance between the two of you.
Don't let their silly games get to you.
I just want my kids to be safe from his insanity and I WANT THAT SUPPORT PAYMENT. THAT's it.
This too shall pass. For now, you're going have to dig in deep for that last reservior of strength and fight for what YOU/DDs are rightfully entitled to. Support payments and half of his retirement. Oh and half of the funds of the house sale.