What you buy with your money is your own business. But that said you may not want to get your feelings hurt again so I wouldn't go fabric shopping with her. My sister is somewhat they same way. I found that it is just easier on my feelings if I don't go fabric shopping with her. She doesn't understand my hobby and she doesn't want a quilt. So I don't shop with her and I haven't yet given her a quilt. Other than that she is a pretty good sister.