As it happened, I had just ordered some red gingham that day and had expected it to arrive on Friday. I was beginning to panic when it didn't arrive either on Friday or Saturday but, thankfully, it came yesterday so I set to and got busy with the sewing machine.
I finished it off this morning, sent her a photo to make sure it was what she wanted and she got back to me saying it was exactly how she imagined it would be. Yay!
I put it on my shop as a reserved listing with no photo (in case someone else decided to buy it!) and, within about 10 minutes of me giving her the link to the sale, it was all bought and paid for. I then wrapped it and posted it this afternoon. A wonderful experience for my first custom order!