Seriously, it's in a woman's nature to feel insecure. No matter if she's a dime / notch whatever. And her man is skinny, fat, ugly etc. Women are possessive creatures by nature.
I get bitched at for doing regular maintenance things that people do. After awhile though, like MysticOracle said, I say, "Dont even start that bullshit!" and that's the end of it.
The rest of the time I ignore her rants & she shuts up after awhile.