My dad died when I was 11, in quite unusual and traumatic circumstances. With hindsight, as an adult, I can see how awful that must have been for my mum, but at the time my main feeling was one of being unsafe and adrift, as she was so wrapped up in her own grief and anger about the situation. She became half the parent, when I needed her to be double the parent, and the dynamic shifted between us so that in a way, as the oldest, I was forced to share responsibilities with her - I used to sleep with a knife under my pillow to try and protect us if anyone broke in, as I didn't feel I could trust her to take that role. You've mentioned the end of childhood - I think my mum could have done a lot to mitigate that, but she didn't, I became someone who suddenly was tasked with more housework, babysitting younger siblings, I could wire a fucking plug and was going up the attic to fetch stuff when I was 12 because that was the stuff my dad used to do and mum couldn't / wouldn't.
She was always angry, always crying, always resentful - it was as if it had happened to her, and her alone, it didn't seem to register that I had lost my dad, it was all about what had happened to her and the lone parent / financial situation she found herself in.
And she then got into a new relationship pretty quickly, with someone who clearly didn't really want us around. My dad was, and is barely mentioned since.
You sound like a lovely mum and I'm 100000% sure you will be entirely different to mine, but if I had to give you one piece of advice, it's to try, as hard as you can, to put your DD first in all of this, even when your own pain is colossal. Make her feel safe, and that even though her dad is gone, you absolutely have her back and her home with you is safe and secure and a place where she is still a child, and will be looked after. And in years to come, acknowledge that even when she's an adult, not having a dad is really, really hard.
It sounds so obvious when I say it, and you have acknowledged some of this already so my advice probably isn't really needed, but it's something I didn't get and it's affected me hugely, even 30 years on.
I'm so sorry you are going through this
, life is incredibly cruel