Being a mother is not easy

This happend last weekend when I went shopping with friends. 

I was in a shoe shop, looking around then I heard someone sort of shouting or I should say talking very loudly...

I turned around, it was a girl talking to her mother. 
"SHUT UP JUST SHUT UP" 

The girl said to her mother. Of course, her mother was quite angry I can see. The mother was about to leave the shop, angrily but then she looked at the daughter...and turned back into the shop. They were arguing. I think the girl wanted a pair of heels that don't really suit her but the girl refused to listen to her mother's advice, so she yelled and told her mom to shut up. I was kinda shock when she talked to her mother in that very rude way. I was quite angry too. Hmph.

Then, a friend of mine was on the tram, she heard a girl talking over the phone talking very loudly too, to her mother too. 
She said "Mum, can I step on you? Motherf*cker! I am already 15....blablaablabla" 
Enough said. I need not to elaborate.