It's so she can get some sleep! Her prayer is because she's tired, right? 'Two birds with one stone' kind of thing.

[At this point, Yuya's wised up to start breathing out of his mouth, and Vector's suggestions have him hunting at the diaper station again. Baby wipes, baby wipes...]

Got it-- agh! [It's his luck that has him slamming his head on the edge of the cabinet. One hand with an empty box, the other with the new pack of wipes. All the commotion has the baby whimpering and on the verge of crying.]