Monica, I feel that this is not my place. I’m neither mother nor stepmother. The only thing I can add to this is daughter of divorced parents since age 12. I am 36.
I did not like my Stepmother. I’m still not too keen on her, but I have reasons for that. This isn’t my space, I do not dwell here. I keep to myself often and only really interact with my Dad and Stepmother when my kid sister is the topic. There are instances in my life that cause me to feel this way, it is just best I remain where comfort is.
I wish I had more to add. I do wish you success with your young one. I cannot imagine what it must feel like to watch it all go down as it is going down and feel helpless.