Not looking foward to tomorrow...

Were having a early christmas dinner tomorrow at my mother-in-laws (who is lovely) as my brother & sister -in law cant make it home for christmas with the whole family there will about 20 of us in total so it will be a mad house but the problem is that there will be so many people there & they are all going to be on at me to eat & on about how I am to skinny & will make myself ill if I dont eat ect Im having a really hard time with eating at the moment & really dont need to hear it from them all day as its all I get every time I see anyone one at the moment.

So what I really want to know is if any one has any tips on how to make it look like I have eaten more food than I have & help me get through it all