Have you ever had a housemate who's eaten your food despite repeated requests for them not to? It's a far too common occurrence. Working a long shift, looking forward to your leftovers at home, just to find that a disrespectful roommate has remorselessly consumed them. It's beyond irritating. But what if it wasn't your roommate? What if it was your sister who's living rent-free in your home? And what if it wasn't your food, but food specifically bought to satiate your pregnant wife's cravings?…