Phee, sorry to swear, but fucking well done. Really. I cannot imagine how hard it must have been for you whilst you were shaking and reading out what knew was right for the DTs in front of him whilst he's talking about "following his heart" and getting grumpy with you.
the idea his parents will lend him the money hurts me…
You know what? My instinctive reaction when you wrote that his parents were lending him the money was exactly the same as yours. That must be incredibly painful after 12 years since you were teenagers. So hard. I think you had said from his brother's affair that you knew they'd back him wholly, but it doesn't stop it feeling like a knife in you that it couldn't be a case of them calling you up and saying ,"we'll do this to protect you and the DTs but he's an utter bastard and we're devastated he's done this…
…they are devastated, they probably won't ever admit it, and that wound will heal. Your family love you so much and will help you through this. Get it signed over to you asap because this is about you and the DTs and the security and freedom you so rightly deserve.
The story will out (it always does) about the timeline with WF and what an utter betrayal of you and the DTs it was. No one with half a brain cell and an ounce of heart is going to think "yeah, but he "gave" them the house." I'm so glad you have it, but it doesn't erase one tiny shred of how despicable they've been. If he'd forced you out the house then, yes, people would have thought even worse than what they already think… doing the basics to make sure his children are secure does NOT suddenly make people think… "hmmm, he's not so bad after all". It's the basics of what a parent should do, it's not some sort of angelic action. He's not emerged from this smelling of roses.
It might not have been your ideal outcome of you and H talking for the first time but you stood up for you and the welfare of the DTs and, although you feel like shit now, one day you will raise a glass to yourself in recognition of that fact that you managed to say your bit and stand your ground under such enormous pressure.
I'm pleased for and (dare I say it because it sounds so patronising from someone you've never met but it is sincerely intended...) proud of you.