Your mother won’t forget you right away. There will be plenty of time to prepare logistically and emotionally for this event. You’ll become accustomed to the usual symptoms over the course of months or years: forgetting appointments, tripping over the names of acquaintances, the first missed birthday. When she begins to fumble overlong with her seatbelt, you will buckle it for her without overthinking the sad poetry of this role reversal. Next come the bills. Then the pills. You will noti...