One of the biggest challenges of parenting can be navigating other people's children - and their behaviour.
However, one mum has been left speechless after two little girls posted a 'nasty' note through their door to try and upset her four-year-old daughter.
Taking to popular Mumsnet forum Am I Being Unreasonable (AIBU), the concerned parent voiced her worries and checked with other mums to see if she was being out of line.
