Thanksgiving Dinner

So I ate Thanksgiving dinner with my sister-in-law's family. It was really awkward. First of all they start speaking chinese to me. Of course I look at them straight at their eyes and say, "I'm Korean, I don't understand." And I swear they're asking if I'm Beijing and such. Then her dad says, "Your brother in law is cute but is little bit on the pudgy side." Cute? Pudgy? Seriously? I know I eat a lot but I didn't realize I was getting fat. Then, her mom is like, "Oh here's some food. Eat a lot. I know you like to eat." Then of course I ask my sister-in-law, how does she know that? And she explains she told her mom that I eat like a freaking cow. I was so embarrassed. Then entire night I was given food all night and she's a dietitian. But they were really nice and not what I expected. Her mom wants to take me out for dinner next week. It would be rude of me to decline.