That is so twisted. This is the kind of thing I would see in a psychological film. It's extra sad that the family got no clue that what they are doing is detrimental to your development. Or they are well aware and don't care.

Understand that you are beautiful and you do matter. Concentrate on you and your health. Stay humble and make the best of your life. Continue on working on your weight and keep you chin up as you walk. Walking with confident can be hard but it can be done. And Happy Birthday.