When my second was born, my mom took off a couple days to watch my daughter, then 15 months. When newborn son was readmitted a few days after birth, I roomed in, and since it was the weekend my mom watched her again.
When number three was born, my mom watched the older two the night I was admitted for induction, they were with her the whole next day, met baby that afternoon, stayed with her the second night, and she took them to my grandmother's the next morning before work. My husband got them that evening, took them back the next morning to help get me and baby home, then picked them back up.
Mom to a girl - 5, a boy - 4, and Baby - 21 months