When our first daughter was born, we thought the “what your baby will do this month” books were extraordinarily cautious with skills they predicted she would display each month. Her older sister, Hannah,1Close easily breezed past each expectation and was months ahead of the expected benchmarks by the time she was 4 months old. Because of this experience, we were unprepared for the struggle we witnessed as our younger daughter worked herself to exhaustion to achieve each milestone.
This shows how jarring it can be when two siblings develop so differently. It perfectly captures the surprise and worry parents get when their child isn't meeting their expectations. Which can in turn, lead to parents comparing their children, creating an increase in pressure, unhealthy competitiveness and resentment amongst the siblings.