Advanced liver cancer - Incurable but treatable. My daughter isn't taking the news so well. How can I reassure her that this is a positive?

Hi, 2 days ago I was diagnosed with liver cancer that has spread to my lung. The consultant said that it can't be cured but can be treated, and that because I am young (53) they can bombard me with all the treatments, which I said I will take all they can give to me. My family haven't taken it so great, especially my daughter, she is obviously very angry but also quite negative in the outcome. I'm waiting for a biopsy to confirm everything etc and I've tried to explain to her that the fact it can be treated is a positive in a bad situation. I'm just wondering if anyone else has been through this or going through this, so that I can try and give her some reassurance that I'm not going to be gone in a week. Thank you in advance