Is it normal that my obese neighbor mows the lawn in her underwear?

My next-door neighbor is a fat 50-something woman who routinely mows the grass whilst wearing no pants. She does wear underwear (thank God), and though she wears a shirt she forgoes the use of a bra (made obvious by her sagging and pendulous breasts).

Every time she sees me she'll stop and acknowledge my presence in a cheesy, overwrought fashion, as if aware of my discomfort and mocking me accordingly. She raises her flabby ham-hock of an arm and with a smile calls out "Yoo-hoo, John!" Without exception I am too stunned by her monstrous cottage-cheese thighs to respond.

I have no idea what to do. One would assume that the other residents of the neighborhood would be all too willing to back me up, but their idea of a plan is to just ignore her and hope she moves away soon. Let me tell you, yesterday ain't soon enough.