Morning
For me personally my GP has been the most stable influence in this process and has helped me mull through and understand why, as time has gone on, I keep collecting specialists, learning terminology that I had no need for previously and being subjected to all sorts of different scans and tests. Breast Surgeon, Breast care nurse, Medical Oncologist, Gynaecology Oncologist, Neurosurgeon, ...………….does it ever stop!
As we are all aware Breast Cancer doesn't discriminate! No doubt for you your medical, logical brain is trying to take control however it's okay to be that frantic patient who is struggling to get their head around it all!
I note that above a great link has been provided that will help with your step children, here's another couple of links
https://www.bcna.org.au/understanding-breast-cancer/talking-to-family-and-friends/telling-your-children/https://www.bcna.org.au/understanding-breast-cancer/talking-to-family-and-friends/https://www.bcna.org.au/understanding-breast-cancer/types-of-breast-cancer/The BCNA website has a lot of very good information
Best wishes as you work your way through emotionally and physically and as everyone says no question is silly so ask away!
Take care