My son's the first "apo" and first "pamangkin", obviously they (my family) tend to spoil him and sometimes it really gets on my nerves. is there ways on how to unspoil your child?

I talked to the whole family since my kids are the first grandkids. My in-laws would ask first for our approval on everything for the kids. They also follow our house rules even if my kids stay on my in-laws house. Less worry on my part cause I know they ain't gonna be spoiled.