Df would only get up if it was a bad night where I couldn't resettle Ash or something like that. He was helpful in pacing the floors if need be. But otherwise he'd put his ear plugs in and sleep. My thought was what is the point of us both losing sleep? I was BFing so why get him up. One tired parent is better than 2 tired parents.
He helped out in other ways he cooked every night and did majority of the cleaning in those first few weeks so I think we worked it out quite evenly.