It's not too late !!! Don't look at it in a negative light !!!
You can do this !!! Get stubborn as can be and fight this fight !!!
Your surgery, Your weight, Your food intake..... it's all YOU. Not the others in your home.
Take control and find ways to take your mind off of food when you see others in your house indulging. Maybe go for a walk if possible. You are on this forum... and that's a good beginning. We are all rooting for you !!!