there are a lot of people in the world who give with no expectations. just cruise through our donations section if you need proof.
in the unlikely event she asks you for a quilt you have several options. these are just two among the others:
1. offer to teach her how to make one. if you still have all or some of what she's given you, haul it out and show her how to make a crazy quilt or something scrappy.
2. if she points out her past generosity as a "gotcha" tactic, offer to return everything. if you don't have it any more, remind her that she never said she was making payments toward services she'd hoped to receive down the line.
why wait? if you belong to a guild, invite her to a meeting. she'll meet people and might decide to keep her fabs in the future to make her own quilts.