Now that we're in a groove as a family of four, DH & I pretty much 50/50 on random MOTN wakes with whoever is more awake, wakes first, or has a later start to their work day!
DS1 needed us for a potty break (he was extra tired) and I took him. DS2 woke up at 5am, and DH went and paci'ed him back down. They both slept until 740!
I'm so glad that I'm not 100% on night duty (for baby) anymore!