with napping DD1 would sleep in her room and DD2 would sleep on our bed (we have a low set futon though lol). DD1 doesnt have naps anymore and stopped about 3ish months after DD2 was born...

DD2 now naps in their room and i tell DD1 to get any toys that she might want to play with out of the room before DD2 goes to sleep. works a treat.