My boyfriend keeps bringing up the fact that he wants another child 😬

So I'm 27 and hes 26. We already have a two year old and have been together for 6 years. As much as I would possibly like another child, I just cant even imagine the extra work. Like with one you just put them to bed and it's over. But with two you have to worry about putting both of them to bed. I just feel like it would be so hard. Was it a big transition for you? If we do have another one it wont be for another two years, when my son is at least 4. Thanks everyone 😊