Sorry I'm a little late to the game here, but anyhow. It's good to see you still on the board here. Although it is a bad reason I'm glad this has helped your R.
Remember, you have taught your D well, she does have here free agency, but make sure you show her what true unconditional love is. Make sure she sees how that can not be seen with the beast. Perhaps she can use a call from her older sister.
Maybe call local T and put her name on the roll. Continue to pray, show some faith and put it in his hands. Remember, this is her choice. Perhaps H needs to see that this is time for unity. Maybe it's time to call a family weekend, have as many as can make it meet in a middle location, so that there is a happy loving sitch. During this time she will see that what beast will offer is nothing like this. A good time for sisters to sit and talk. (not a bad chance for H to see positive times in R and united family).