i agree with several others here ..take it out. it's not that large an area ..won't take too long to unstitch, trim ..restitch/quilt & reattatch the binding. you'll feel better about anice finish. ..and then just enjoy her thank yous' for the lovely gift, instead of a lot of time explaining to your friend about how you wanted to take your personal time to make her a quilt, but didn't care enough to take your personal time to repair the sewing error in the quilt.