Good for you for thinking of the sewing kit! Give her the line about giving a man a fish and feeding him for a day versus teaching him how to fish and he can feed himself for a lifetime! In the meantime, I`d come up with a price list showing my charges for random repairs (if you want to get in to doing repairs).
Years ago I had a neighbour who went from asking for help with little things to altering a wardrobe. I simply put the wardrobe items aside and when she asked, I said that I had other things that had to be done first. She got the point. I would have been glad to help her learn ... but not to be her life-long seamstress.