That we’ve all either been kidnapped or (more likely) Dan is at work and I took the babies out somewhere, so the animals are resting/saving their energy to annoy the crap out of me when I get home.
Seriously. Even when the kids are asleep, some creature somewhere is making noise. Or the TV is on. Or the washing machine and/or dishwasher is running. You get the picture.
Twins + 3 cats + dog + fish tank + 2 adults = a cacophony at all hours