Monique you are faced with and extreme situation and I think unfortunately everyone is different and there is no right or wrong way to handle things. The truth is you have to do what is best for you, hubby and daughter.
I can only sympathise I was lucky my husband survived his cancer and I survived mine, but I remember the days when I felt so mad that he just sat around. Or when I looked at him and he was grey in the skin, no hair and looking very sick and I had to busy myself with other things to not break down. I focused alot on my son and making sure he was fine and coping wiht the whole thing, that was my way of dealing with it.
My husband was mad at me when I was sick and going through treatment, I was so upset at the time but I did realise he was struggeling and the situation was out of our control which mad him frustrated.
I hope your husband, daughter and yourself are doing ok right now. Sorry I can't be of more help, but I just wanted to let you know I am thinking of you.