Just wondering if any one does co sleep with 2 and how are you all positioned?

Arquene sleeps with us all night and makon usually half the night but cos Arquene has taken the middle spot makon has been trying to sleep on the edge(i dont really like him there)or i sleep with arquene on my chest so makon has the middle.
also we have a queen size bed and were thinking of upgrading to a king so it would be a better fit would that be the best option so they both can be in the middle?
also is makon likely to roll on to arquene??

thanks girls