My aunts nephew lives with her to help her, but he's not helping and eating all of her food. Any advice?

I live in n.y. and my aunt is in luxor pa. My aunt joan d. is 88 years old, she keeps asking him to leave her nephew but he doesn't, she asks him to help her while he is living there, gives her no money, and eats most of her food. she does get food from private people who brings her a dish. her sister-in-law lives on the property and does nothing, it is her son who is doing this. the grass around the property is overwhelming, and he won't even cut it for her. again she ask him several times to leave, but has different excuses, i wish some authority can check this matter out. her names is joan d.