An AC shouldn't ask their parent to put them before a sibling, their other parent of their parent's partner, anymore than a parent should ask their AC to put them before that AC's husband/wife/partner/p'si.l. An AC shouldn't ask their parent to put one GC before another.
When it comes to cases of abuse and abusers, it is absolutely okay to say, "If you are going to allow 'x' to be a part of your life, I won't be around you or allow my children around you." Not long ago we had someone on here talking about how her son had sexually abused his 2 sisters. It's not unreasonable at all for the Sister's to say, "Him in your life or Us."
To do so and/or to agree that that is the right approach is dysfunctional thinking. Nope. It is not.
When it comes to abuse, both children are now victims of sexual abuse and yet elana said, "there is no sexual abuse going on in my family period." Yes these IS! It doesn't get more clear-cut. It has been introduced whether elana wants to recognize it or not. And 'not' is going to end in estrangement because she is in denial about how abuse, especially sexual abuse, works. That is justification enough (regardless of daughters mental health) to keep her children away from her.
There's a line between enabling dysfunctional thinking and full on cheer-leading it. "Her D has a problem that needs professional help and all elena can do is hope she realises this, gets the help she needs and be there for her if and when she asks her to be." THAT is certainly not ALL elana can do!!!
elana doesn't think that everything her D says is a lie; where has she said so? Again, are you being deliberately obtuse? No, not obtuse, equilateral or any other other type of triangle. However, I know how dysfunctional thinkers behave and now that she has what she thinks/believes is 'proof' that daughter is lying about the children not wanting to talk to her, this will/does lead to the mentality of everything daughter says is a lie.
Because my 'mom' has "selective amnesia" and just "can't remember" the shite things she did to me even after I recalled some events in vivid detail, makes me a 'liar' in her world. Way to encourage that mentality in others' Smileless...
As MoD said, "It is easy to see why you are estranged Smileless, no matter how much you plead ignorance over that too." As I have said before, your DiL may be a Narc witch herself, but I don't believe for one moment that she is 100% the reason you are estranged.