Protein requirement is depend on the body of an individual body weight however according to the RDA for protein the requirement is 0.8 gm per kg. However relatively it is more in the 2 year child has highest than other as their development process is faster than others.
You should sit down and have a calm and collected talk. start of easy and work your way up to it. Make sure to tell him you love him and that this is who you are. I think he'll understand and he'll love you know matter what.