I have 2 parents on mat leave right now. One has been on mat leave for 2 months and I've had her child full time even though the plan was 2 - 3 days a week. The other hasn't had the baby yet but has started mat leave at one more day then origionally planned. I think it depends on how young the older child is. In my case both are only 18 months. I'm ok with it! More in my pocket.