What will happen to the kids if they put me in prison?

Hi im a dad of 3 daughter lives with me whos 11 and two sons with kids mam.

I see my sons every other weekend was paying kids mam cash every week till she decided to get csa on me ,now bin to court they have got liability order on me I live in a furnished rented flat have no car of my own and work as a self employed joiner.

I cant afford what they want of me as I couldn’t live with whats left but there not bothered about that bin told I fave prison over 3995 arrears debt which isn’t true but iv no proof iv bin paying kids mam as was private arrangement so what happens to kids when im in jail.