We want them to look out to each other, to learn and play together.
We don't expect to get anything back from them, if they want to give us
care when we're super super old, like over 90, it's not bad. But
most likely we'll all ended up in a nursing home, like other parents do.
So don't you expect more children would do more for mommy and dad's old ages.
Realistic thoughts, no one would want to shoulder aging parents till death in our time.
They sure will be happier as kids to have a sister or brother. No doubt.
Risk for mother? Yeah, but very little. Seldom anyone dies from childbirth here.