I had a dcg who was here starting at 4 weeks old (family friend). Around age 4, she started asking when mom was coming, because her mom worked into the evening and the other kids left late afternoon. So I put a schedule of our day up, and directed her to it every time she asked. She could see where we were in the day, and what needed to happen before mom came. It stopped the questions immediately, and put her in charge of getting the information she needed, which made her feel very grown up. She would often go over the schedule with the younger kiddos.
She's now in kindergarten, and I haven't needed the schedule, but it is still on the wall for the next one who starts the questions!
Good luck! I know this is hard.
