Just try to keep the little ones safe, well-hydrated, moderately well-nourished (pizza’s not a bad idea, if they already have teeth), moderately content, and relatively clean (-aim for very basic sanitary standards).
Don’t worry about the house. It won’t cry, or pick itself up and leave, if you neglect it.
If you can, try to give the kids, and maybe even the house, a quick polish before Frogette shows up. Don’t want to have her faint while holding a little bundle.
And get yourself an occasional bit of sleep.
Mazel Tov!