The sober adult-child speaking here, it is so unfair what we do to our parents (and other family and loved ones) when in active addiction.
My family has only truly healed, and continue to, as each of us has gone through my mother's active alcoholism when I was 11, off and on, til mine of 3.5 yrs last wk.
Best and my prayers to you and your family- daughter included- and grateful to you for indeed caring for the baby.