I bet if you asked, they wouldn't mind if the quilt came later. Besides it's summer now and they don't need it to keep warm! The only reason daughter #2 got hers on time was cuz my machine was gone for servicing for a month.LOL
Don't rush it or you're liable to make a stupid mistake and that wouldn't be good for you. Enjoy the upcoming week and finish it later.
Christmas could be good!
kathyd