If my DH has an issue, he knows where the couch is. DH is up just as often as me anyway, either with bubs or with one of the other kids. The way I figure it, my sleep is just as important as DH's - possibly more so, because I am the one caring for the kids all day, driving them in the car etc, so if I slip up because of fatigue it can be extremely dangerous; If DH stuffs up at work, it's not good, but at least it is an office job, so his health shouldn't be directly at risk.

Having said that, I do try not to wake him unnessecarily.