I try very hard to return quilts to my customers in a timely manner, especially when we have an agreed upon due date. That being said, stuff happens. Illness, family problems, machine breaking down, the quilt that should have take 4 hours to quilt takes 4 days, thunderstorms when you don't want to run the machine......you get the idea.
But if I am having some kind of unexpected delay, I will call the customer and let her know.
Since your LAer hasn't done so, I would call her and remind her that you needed it for a particular date.