Leaving us

My best friend in the world moved away a couple of days ago. Our kids have been friends for literally their entire lives. We were behind their Uhaul, heading home as they started their long journey. I was crying. My 15 year-old son was trying to console me, and I was like, "I know...it's just that she's the most important friend I've ever had. We had our babies together."
He said, "I thought you had your babies with Dad."