skin to skin with baby

How long do u believe skin to skin contact with your baby? my son was a week old and hubby and I were still doing skin to skin, i ebf as well. well my mil made a comment my son is too old for skin to skin at a week old!!! and that it's only for the first couple days. I told mil my Dr stated to do skin to skin as much as possible and as long as possible but mil claims that's not true? what do you think?