As a business owner myself I know how important it is to be upfront and honest with customers about when a product and/or service should be expected complete. Unexpected issues can arise and most people are very understanding but to make it a habit to be "late" is unacceptable to me. I'd rather be completely honest with a person and face losing that customer one time than to have it continue and face losing their business altogether. I'd just be completely honest with the person who does your quilting and explain to her you're not pressuring her in any way but would also like her to keep the timeframe she has put into place to have your quilt finished. JMO.