The problem is that airBnB rules say that the guest making the booking must stay accompanied by other guests to the occupancy limit of the property. You cannot stay in two places at once.
This is echoed in my house rules following advice on this board so if you booked my place for your boys and told me you were staying elsewhere you would not be given the keys, you would be asked to leave and you would not get a refund from airBnB for breaking the house rules.
My children, youngest 22, have theor own airBnB accounts