Photographers Problem. What do i do? 🙃

So i had my photographers all set when i first planned my wedding. Paid my deposit and everything was set to go. Then covid happened and i had to postpone everything. Its now 1 year later and we are able to have a much smaller more intimate wedding as again there are covid restrictions still in place. My wedding is in 3 wks and my photographers (who are a married couple) just messaged me saying that due to restrictions they now will be bringing their 2 young children. Firstly i have no children at my wedding except for the acceptance of my own child who will be there for obvious reasons. 2nd i have already cut my wedding down from 150 to 20 people and had to tell alot of my guests they can no longer attend due to numbers which i included my wedding staff as part of that number. 3rd they have told me that they dont have any options of family or friends to care for the kids. And lastly they have said my deposit is non refundable.
I dont have time or the extra money to hire new photographers and i also would feel super guilty if those kids came because that could of been 2 extra seats i could have given to 2 other family members. What am i suppose to do? Is it wrong to tell them to just find a baby sitter? And what happens if they cant get care for the kids before 3 wks is up. Help me