I think I got misplaced at the part where you quoted a price and she seemed surprised at the $ you gave her.
Why did she bring the quilt to you then, if that amount seemed to bother her so much?
And as far as that goes, why did you agree to do something with it if she seemed unhappy with the $ quoted.
And when did ownership of this pass to you from her?
Two lessons I have learned:
1) Try to see what might be involved in a project before committing to it - and estimate high. I've learned not to agree to anything "sight unseen" (Exceptions - accepting my children when they were born)
2) Even if a friend says "Will you do a favor for me - - - -" - my usual response is "It depends - - - - need to know what it is before I commit to anything"