A.D.
Our twins were 22 months when I had a c-section to have our daughter, while I know it's not the same surgery I wanted to respond with things we told our twins to keep them "off" Mommy. We talked about booboos before I went and pointed out any (small or big) they had for examples. When I came home Daddy reminded them Mommy had a booboo and needed a nap. I stayed in our room the first two days and they visited me in there, while we reminded them to be gentle. I think with a constant reminder of be gentle everything should go alright. Have your son come lay in the bed with you, watch his favorite show or read a book together. Everything should be fine just be cautious! Good Luck with your surgery!