In the last couple of years i get a similar feeling when i eat around my parents. And only around them. I have a great rush of anger and self control management issues arise when i become aware that my father is watching me eat.
I have an urge to tear myself apart or anyone who comes my way when i see or hear him eat too.
Gotten used to it by now though, as i don't live with them anymore, only when i'm in town, so i'm not sure how i can give any helpful advice other then let you knw there are others too with these kinds of problems