Why is the best seat in the house always where I’m sitting? Is it because I sit in the cushiest chair? No. Is it because I sit in the prettiest chair? No. Is it because I sit in the funnest chair? No.
The best seat in the house is always wherever I’m sitting because the best seat in the house is apparently my lap. And if I’m sitting, it’s where every kid wants to be. Well, it’s where at least one kids wants to be, which makes it where the others want to be as well. (“Why is it his turn now? When is it my turn to sit in your lap? How come he always gets to sit there first?”)
I should enjoy it while it lasts. I know that in a few years, I’ll be begging for someone to come sit with Mommy.
It’s good to be wanted. Or at least bickered over. 
Yeah, I have that problem as well, only most of the things that want to be in my lap are four legged. The worst part about that is they seem to get upset if I want to move or type or sneeze. And they have claws, sometimes very sharp ones.
My kiddos like to “help” me type when they’re invading my space. But at least no claws, as long as we’ve been keeping up on their hygiene.