Look at it this way, if you give her an estimate (put it on the high side if you really don't want to do this), she'll have to either put up or shut up. Put the ball in her court. If she really wants the quilts, then she'll pay for them. If all she wants is a freebie, then she won't mention it again to you. :roll:
You're time and effort is worth her paying for them. Family or not, you have to realize that your hard work is worth being paid for.
Lee