Been separated from ex for 2 years. I have stayed in the house and am paying mortgage, he is renting. I have the 2 children with me, he sees them regularly and they stay with him occasionally. We took out critical illness cover for us both when we set up the mortgage - now it is likely to pay out as he has a qualifying illness. Assuming he can still go back to work after some recovery time, would I be reasonable to ask for some of the payout to pay some of the the mortgage, as we would have done if still together and/or for it to go towards his childcare contribution in advance in case he is unable to work further down the line? (He pays CSA advised amount).