Maybe going off topic but most women I know, at eligible age for bearing children, want to have children because there is simply a choice that a man does not have. There is much between a mother an a child. When a women reaches the age when they are unable to have children, or that the society takes too much toll on such activity, then they wish to give up but in their mind they have wished they could have taken the opportunity to have children. Nowadays, society pressures is pushing for families to break up.I still don't understand how a married couple is going take advice on how to life a good married life from a group of woman who are not in a household path?
BKs (kumaris) tend to leave it behind them but many still often talk wondering what marriage would have been and what having a child would have been like. Thus it is mothers who (at least according to PBK, but it is in the BK Murlis too) are given the leading roles. Even if (unluckily) a child is born out of illegitimate way, there is still a huge bond between that child and the mother, and even to this day Dadi Janki has the occasional reminder herself. Because the soul of that child is strongly linked to the soul of the mother, and regardless of the strives pains and hardships a mother goes through, the gift of love a mother brings to a child is both physical and spiritual love.
So the greatest love you can get from any BK (kumaris) is the love of a sister. That is why folks do have love for BapDada (in the role of the mother and Father) as it is missing. But many sisters still talk about (and thus implied yearning) of what it would have been like to be a mother. Because a BK can only play a role of a sister, and there is no role as a mother. When Robin Gibb sung the Mother song for Dadi Janki, it does not seem to work because in the end of the day although she has accumulated much wisdom, it is that of a Senior Sister, so each time that "mother" word is sung will simply remind her of the past.
There is much difference when speaking to a BK who is single and a BK who is a mother.