Well, I have triplets and each had children at the same time . 1 had 1 , the second twins and the third triplets.
And the one with the triplets had less parenting skill after the baby grew up than her siblings. The one who had one child was the best.
Ironic!

And I have got 2 sets of twins at the moment who stay together.

When they were little, 1 set of girls, if I took one to look for collectibles the other would look up and run as though following.

The other pair are working and even if I set their skills separate they will still only work side by side.
They run at the sight of a woman!
And will both not drink potions.