also, it is really really important that he does not get the feeling that he is excluded from your room because of the baby
I am afraid that is the best way to get him to kick the baby
he needs to be wherever you are, during the early months of becoming a big brother. Sometimes, it may mean leaving the baby on its own (it won't mind!) and taking him with you when you go into the other room
I wouldn't leave him alone with the baby though, if he is feeling a bit wobbly
make sure he is where you are
but excluding him from your presence is going to be pretty much a no-no from now on
in many ways, he needs you more than the baby
this can be hard to get your head round when you are on your second pregnancy
you think he needed you so much when he is tiny; now it's his turn to give way gracefully to his new little sibling
it isn't
the fact that there is a new baby won't make him any bigger or less demanding; if anything, it's likely to make him need to be a baby too