How would you feel and take this?

well i wouldnt personally but some people have anger issues. also she may have had some pinned up aggression from years and years bottling it up and could have exploded at an inconvienient moment. if i were you i would just let it go because she is your family and i am sure its not like you havent ever said anything hurtful that you didnt mean to someone you love. so just let it slide( without letting her run all over you)talk to her about it if you have to but make sure you calm down first and try to love her anyways, it may be hard but its your best bet.. much love and goodluck girly