You only delayed the inevitable by making excuses as to why "today" wasn't a good time. That also leads her to believe you are open to sharing it, 'at a more convenient time.' You need to tell her you can't share it for two reasons: 1)It's copyrighted, and 2)You paid for it. She will have to buy it if she really wants it.
Many people like that would never end up making the quilt anyway, they just want to hoard up whatever patterns they think they can get for free.