I really want to cry for you, especially after looking at Jenna's sweet sleeping pictures. I know all too well a similar situation like this - my friend and her baby daughter. She never ended up going to jail (although she should have) but it was the same situation - abusive baby's daddy, drugs, wasting money, etc.
Except, she isn't as fortunate as Amy Beth. Her family was very abusive towards her but still turned around and bailed her out. She still needs to learn after a year or so of this happening, just like Amy Beth, and it's a great thing you are allowing her to learn. Sometime down her path she will thank you for this, I am sure.
I am so glad Jenna is in your loving care. She is a very beatiful little girl. I want to give her a great big hug.