Flashman, saying it wont have an effect on the little is, ime rubbish!
I was at work one day [dental nurse] and a mum came in for an hours+ appt with her 3 yr old.
3 yr old had been asked if she needed the toilet & said no, so we commenced mums treatment.
About 20 mins into appt little girl pipes up "mummy, need wee" Mum said "no you don't, I asked you before, you can wait"
After telling her mum3 more times, each time getting more & more distressed & dancing on the spot I offered to take her, to which mum said that her dd didn't go off with strangers & she was perfectly able to wait [another 40+ mins, mind you].
Little girl didn't last 4 mins, she wee'd all over the floor & was distraught! Sobbing & saying she was sorry!
I cleared it up, but mum didn't bother to get up to change her/help. That little girl sat sobbing for the remainder of the appt in wet soiled clothes! Nice!
If I had dared speak to that child the way the girl did in the OP I would have been severly repremanded! I was only young, but I knew that it wasn't acceptable to speak to anyone, let alone a 2 yr old in the way she did. I was more annoyed at mum not clearing it up, but bit my tongue & had a good whinge to collegues afterwards. NEVER would have dreampt of voiceing such hatred toward a 2 yr old!