DH got a mean letter today from SD14. I don't know what to do to help him anymore, I feel like I tried everything to help him reconnect with his SD whom he loves dearly. But a year ago things got really twisted. It all makes me very sad and I'm distracted times likes this from carrying on and not letting the sadness consume us. 
 

She didn't give the letter to him herself as it's been almost a year since she has come over for visitations, recieved phone calls, texts. She had the SS deliver it to him when picking up for weekend visitation. BM messaged us a year ago when it all started and said neither of us should contact SD14, claiming she doesn't want to talk to us. So after a few attempts of at texting with her, and the BM always stepping in and making group text and making things more traumatic for all involved. DH decided it was best to give SD the time and space she needed as it was requested by her, and it seemed that all continued communication was resulting in conflict from BM. He really didn't want to make things worse for SD his baby girl. So he decided going forward he would not enforce his visitation rights with her. 
 

You may be wondering what the teenagers reason for changing was in the first place? Well apparently it was me. She claimed that I abused her and hit her with a broom. At the time I explained the situation fully to DH who was in the next room at the time 2 SSs. Even when her stories made me question myself I know I never did any such thing. Also, she had two friends over on the weekend of the accused abuse and they were in the room at the time, myself, SD and her 2 friends. I came in from hallway as I was sweeping to see what they were up to ask if they were going to eat lunch and we laughing and giggling about stuff when SD says can you bring me drinks and snacks. I jokingly tapped her with bottom side of broom and said quit being lazy you know where the kitchen is, a little later I proceeded to bring them drinks and snacks. The rest of the weekend went on, later I drove the girls home and the skids went to their BM.... a month later imagine my surprise as we get texts and phone calls from BM claiming I hit SD with hard end of broom stick and apparently I'm always mean to her when DH is not present. 
BM went as far as to contact CPS to file a report against me, mind you this was also at a time when BM filed to have CS reevaluated and wanted more money. When CPS came to investigate they had dates that didn't match up with visitation, and the whole thing was written off as unfounded, and the report was closed. Even though this hurt me I wasn't mad, if a child was being abused I want it all to be investigated. DH and myself were just dumbfounded by all of this and at our wits ends trying to figure out why this sudden change in SD behavior. Why did she do something deceitful and manipulative. Was she trying to favor attention from her BM? Is she suffering from something more serious like a mental health issue? 
For a short time I even left our home during visitations to give them all a safe place to visit, and I stayed with Family and friends for whole weekends. I did all the right things I cut off communication to SD from myself and I was never again around her alone without another adult. But somehow the situation got worse as she stuck with her story and blamed DH for being a terrible dad and wanted to know how he could choose me over her, that's not what was happening at all. It really tore up DH and there's been nights full of tears from both us when we think about her and miss her. 

As I have said it's been almost a year now, and I find it so hard to support DH. All I can really do is encourage him that time will tell, and hopefully she will come around to accepting him again. The letter he received today really struck him down, full of hurtful words and claims that he made her suicidal and is the cause of all her anxiety. All because neither DH or myself believed her story. And it all caused the major riff in their father-daughter relationship, along with the not so manipulative BM who encouraged the ending of their relationship. She always spoke badly about DH in front of skids and they would tell us about it later. 
 

what do I do now to help them? I considered leaving but that just isn't right. What is best for SD? Should DH continue not engaging in the attempts at dramatic conflict? Or does he try to talk with her and explain that he really does love her and misses her, and admit that he doesn't believe her story but loves her just the same? 
is it more hurtful to tell the SD14 that he doesn't believe her story and spill the beans on the back end manipulation from BM? 
 

I know there's gotta be some stepmoms out there who have experienced the same, and any tips on how you deal with it all could be helpful.