How do I introduce my adult Labrador to my house?

I have a five year old Labrador who lives with my maids ( I have maids because we live in Sri Lanka and 80% of people have them) in my yard the size of a 75% long football pitch and sleeps, eats and relaxes under a shelter the size of a basketball court. We play with him every day for an hour without fail. We couldn’t let him in the house because my grandmothers throat swells up and completely blocks her windpipe as she is heavily allergic, but sadly she died three weeks ago if a heart attack. So now we are slowly allowing him into our house for an hour or so. He is doing very well and unless he doesn’t have a toy in his mouth doesn’t take slippers or shoes but usually whenever he is with us he is used to being the centre it attention always. But obviously in the house we have other things to do! I really need help on how to get him used to not being the centre of attention and fitting in with two twin eight year old brothers, my twelve year old self and my parents, because I love him to the moon and back. Please reply as soon as possible. Thanks!!😀