I have a family member that asks for help eg needs money, borrow something, but never says please or thankyou. The request is usually very vague and its like pulling blood from a stone to find out why. E.g 'can I borrow a tenner'
I've refused on more than one occasion and they've gone in a strop to another family member , who then thinks I'm causing trouble.
Basic manners means a lot to me, aibu to refuse to help without the basic please or thankyou.