My mother in law has this thing where she makes harsh comments towards me. It's rather annoying. She…

My mother in law has this thing where she makes harsh comments towards me. It's rather annoying. She tells people "I look like I have a tape worm" solely based on the fact that I am thin and light completed. She also makes comments about how I don't take care of my family the way I should. She often asks "does she even cook? What was the last meal she made, or don't you remember that far back? Does she even get off the couch?" She also makes comments about how I don't eat anything because she never sees me eat, keep in mind that when we go over for dinner, her house is not only disgustingly dirty but she will also almost always make something I do not like. She doesn't understand that just because I'm reserved and quiet doesn't mean that I will take her bullshit forever. I'm about to go ape shit crazy on her ass.