I agree with greensleeves, except I would say I need it two weeks before the end of May. It's not a matter of being pushy; it's a matter of letting her know that your quilt has a deadline. With this information she will know whether or not she can finish it by your deadline. If not, she needs to tell you that so you can take it to someone else.
It would have been best to let her know about the deadline when you first gave her the quilt.