Exactly what I was about to say. It’s nice to see you back. 
I used to have my own account as did hubby, and a few months after we were married we made ours a joint account. Since we’re both working (and have comparable salaries), it hasn’t been a huge issue. But I know that when inshAllah I am home with our kids and looking after them, I’ll think twice about spending “his” money – even if that’s not how he feels.
The point to remember of course is that you have a very demanding job of your own. Not only are you a mother of three, you are running and managing a household, which is no easy task. The money in that account is for the household, for all of you to share. It may come from your husband’s salary, but just because you don’t get paid for your hard work doesn’t mean the income isn’t yours.