Any other people with kidneys feel like their diabetic family members are vultures?

My younger diabetic sister wants a kidney and now my mom needs one too.

I feel like there are vultures hanging over me, and they are my irresponsible family members with mismanaged diabetes that hope other people will bail them out by given them a kidney.

To make matters worse I feel upset that I feel so defensive!

I resent that I keep being put in this situation of telling my various loved ones that "no! you can't have my kidney!"

Any support groups for family members of actively irresponsible diabetics?