I had the same diagnosis as you ,last September.I have finished treatment and am on Tamoxifen now.I have 3 children in foster care, and when I was diagnosed,we only told them what they needed to know.They didnt need to know the details of cancer.When I had surgery,we just said that I had to have an operation because I had an illness that needed fixing.When I came home, we told them that I was fine,but just needed a bit of help around the house.I looked the same,and I wasn't bedridden.When I had chemo,if I hadn't lost my hair,I don't think they would have known! I only felt tired for 4 or 5 days each round.Apart from the stricter hygiene rules in the house,everything remained the same.I think that you should tell them a little bit at each step,not right now that 'mum has cancer'.We are all different in our reactions to treatments,and what we need.You might do just fine.I did! Take care.Cheers xoxRobyn