parents' biased view of their children; parents overvaluing their children
A set phrase describing the natural tendency of parents to see their own children as more talented, attractive, or capable than they really are. Often used self-deprecatingly or as a gentle criticism.
Thinking my child is the cutest is just a parent's biased view.
It may be parental bias, but I think my son's drawings are really good.
Compound of 親 (parent) + の (possessive particle) + 欲目 (biased view, from 欲 'desire' + 目 'eye'). The phrase literally means 'a parent's desiring eye' and has been used proverbially for centuries.