Oh AK-Jeff, you sound like a wonderful father who just want the best for his childern. My Dad and Mom went through problems thus I was parented by my grandparents!! That is a wonderful and great thing for those childern.
Everything that was ever wrong in her life was due to our failure as parents - even though ironically, it was her very ignoring of the principles we had tried to instill that kept screwing up her life. I was getting worried that she was deep into drugs now. She would not tell us where she lived. She was now wanted on warrants for failing to appear for her probation meetings. And her emails were subtly threatening. I began to review our home security out of fear that she would try to abduct her children in the middle of the night - or worse. I feared that she was using some very serious drugs, running with the worse of the worse. I had no idea what might happen. She had never been violent [with us] before, but paranoia began to creep into my thinking, and we had to work hard to assure it did not leak out to the kids - it was never our intention to poison the well as regards their mother.
No that's not true. My grandparents tried their best as my mom today tries her best... Your daughter is confused and doing drugs can effect her thinking. We as young adults are young adults! Each of us find our lessons and healing from hurt in our own ways. It doesn't make it your fault, hopefully she will find that out sooner then later. (My cousins have been through drug abuse also my fiance back when he was in his 20s, there is still hope and sometime jail or something like this might wake them up)
As for now take care of your grandchildern, give them the 'safe haven' and love they need!! Make them feel special and it's good to not revile to them things at an early age... but not lieing to them but giving them words of comfort.
She will turn 30 next month. I don't know if she will see the outside before she is 40. I don't know how this will end. I am focused on the kids. I am not sure how to tell them, or when. I don't think I will tell them for a long time. They have gotten used to never hearing from her, or knowing what she is up to. I will not hide the truth from them, but see no rush to discuss it at this time.
That's good. Questions will come in your kids but for me I didn't dwell on it til I was in my teens.
My love and consern is with you and your family! I pray for the best.