I'm sure I'll get blowback for this....but if it were me, I'd just make the quilt for the fun of making it and gifting it back to the co-worker. Have her buy the batt and then relax and enjoy putting this simple thing together. It takes all the pressure off you and if she wants to gift you later, then all the better. It seems like this would be a win-win and you could get on with making your own quilts.