Lots of JWs don't have children because the end of the world is just so near, or they have disowned their own children for not wanting to be JWs, or there children are pionnering in some stupid country and literally don't have a pot to piss in and of course they don't have any grandchildren because of the stupidity they have brainwashed there children with.
They leech on to other people kids. They try to fill the void of there pointless lives by being helpful to young families. You have no idea the danger you are exposing your children too.