I really want to tell the woman on the bus it's her job to raise her child not the elder sibling

[Aboyandabunny]

She has spent the entire journey saying to her oldest daughter 'if you play nicely, she'll play nicely, if you go to bed at the same time as her she will sleep all night' etc.
I want to ask her what she sees as her role in bringing her children up.

Yeah it's pretty much neglect

Think you should mind your own tbh.

You are basically saying you know how this women parents her children from a brief exchange you witnessed --earwigged- on a bus.

I would want to know how your role as a random bus passenger gives you the right to question her parenting.

Meh I often say to DS1, age 3, that his younger brother copies him. So if he wants him to be gentle etc. then he must also be gentle. No climbing over the wall as DS2 will do it as well. You don't know the background to the conversation.

Oh people like you are so annoying, stop eavesdropping.

She is obviously an awful parent and leaves all the parenting to her child.