I took a week for everyone to  cool down. Sd, myself, and ex-FDH. I sat down with ex-FDH and talked. He apologized for how he reacted. I apologized for saying the things I did to Sd. He understands why I reacted the way that I did but after this, me and Sd would never be able to coexsit. So we are offically over. I asked him if Sd has cool down enough for all three of us to sit down and talk. I still need to apologize to her for closure sake. 

Since Sd16 moved in with us, it's been....... odd. FDH put her in therapy. She has a lot surpressed rage that's causing her to act out. 

She's still angry about FDH moving away after his and Bm's divorce was finalised. Her elder siblings (Sd25 and Ss23) were angry too but they worked with FDH to sort it out. And the both of them are  doing well for themselves. Sd25- is studying for her bar exam and Ss23 is is in his third year of medical school. They come over a least 3 times a week.