Both my wives, (ugh, that sounds horrible!), slept like logs, so I was always the one with the middle-of-the-night duties. All my kids were bottle-fed, so it was no issue. I'd get up, warm a bottle, (or change a diaper), do what was needed and go back to bed. Gotta say, it was a blessing to me ... I bonded with my kids early on because of it. Just rocking them, singing softly, and staring into their eyes until they drifted off. It was a priceless duty for me, but one I relished, and one that benefitted me as much as anyone, and I thank God for those quiet times with my little ones, and wouldn't have had it any other way ... despite the loss of sleep.