My sister came to visit last week. She's five years to the day younger than me; a time gap that means we spent a childhood hunting frogs and making bows and arrows together, but have since been in different places. When I turned 18, she turned 13; when I entered college, she wasn't yet in high school; when I married, she was a senior in high school.
And now I have a baby. E. on the other hand, doesn't yet have a pet; she's a sophmore in college, a sorority girl who posts her niece's pics on Facebook.
So it's always been a blessing to me that despite the age gap and the different circumstances, we're still good friends. And it looks like she's going to be a fab aunt for my little girl. Even if her major impression of childbirth comes from the film Knocked Up.