My first reaction was not very lady-like.
Does this other person have a CLUE as to what's involved?
You could go into a monolog about everything you did to make it and how long it took and what you added AND the cost of the LA quilting.
Do you see her very often? Do you WANT to see her very often?
Is it big enough to use as a couch quilt or a bed topper?
If you used all the fabric she sent you - that to me implies that's as large as she expected it to be.
If size wasn't mentioned at the beginning of this deal, then I think these people should be grateful.
But - as someone else mentioned - they just may be very ignorant about what's involved with what you did and what they want.