Just to say as an only child I dreamt of having siblings and can understand the pain of a parent whose much loved kids ask for another sibling. I did just that. Now a mother and grandmother of quite a few and realise my longing for a big family as a child has manifested itself in adult life with joyful results.
Yearning to have more children to love and share the joys of life with is natural, no doubt in our frum communities this is magnified by the number of children people have, resulting in kids seeking to share in the love and care of younger children. A child seeking a new baby to love is obviously a child with lots of love to give.
But the pain of total childlessnes is something beyond words, emptiness and a sense of deprivation are profound.
Trim -dearly hope your children may indeed be blessed along with you to have a new baby to love, most of all enjoy your dear children and relish every moment. Sounds corny but really true, my kids are all big now and the sight of younger ones is always a pleasure to behold.