when i got pregnant with the squirt, the squirm was only 9 months old. i spent most of the pregnancy feeling a little guilty about the huge betrayal i was going to perpetrate on the squirm.
fortunately he learned to tolerate the squirt a little bit, meaning that there was less screaming when the baby screamed, but no less hurling of sippy cups.
we eventually lapsed into a sort of peaceful coexistence, where the squirm mostly ignored his little brother, where possible, and kicked him in the head when he got too close for comfort.
it can definitely be heartwarming and cute, and i am highly grateful to see squirm take an interest in other kids.
on the other hand, i sometimes see poor squirt get highly exasperated. i can only assume he is thinking “leave me the heck alone bro! i am trying to watch toy story in peace!”