You can do whatever is easiest for you. At the moment I am putting DS to sleep in his cot for his night sleep then when he wakes during the night I bring him into my bed and he feeds as he pleases until morning. Sometimes I'll put him back into the cot after he feeds but he always ends up back in bed with us. I suppose once they get used to going to sleep without boob they won't be looking for it so much when they wake during the night. So eventually (I'm hoping!!) he will just go back to sleep on his own without needing to be fed back to sleep!