It’s been almost five years since my marriage ended, but the 50-50 custody arrangement is still unsettling. At first, it was necessary and therapeutic, even thrilling, to be granted days and days of kid-free time. It was one of the few things that compensated for the overall awfulness of the divorce experience. Things have settled down a lot since then, and my daughters and I have adapted to the established rhythm of the routine (two days on, two off, five days on, five off), though the transitions aren’t always entirely smooth. What I’m acutely aware of now is how, as time passes, I’m more and more estranged from my children’s other life.