What do I tel my......

im close to my nephew who is six... and I told him straight up that we (my nephew, sister, mom and my bf) were going to stay at a nice hotel in Toronto and that im going to spend time in the hospital because the doctors are going to give me an operation to help me lose all this weight. He was fine with it.. I stayed with my sister and nephew after surgery and he took hos role very seriously.. he would check on me and tell me I cant have any junk food and he would let everyone know that I was on a diet. Once time he asked me for a happy meal from Mcdees.. when the lady at the cash asked if there was anything else he promptly said NO SHES ON A SPECIAL DIET. Kids are fine with this stuff