However, the kidneys don’t stop, just slow down, which is why we all do that beeline for the bathroom first thing in the morning. That’s after 8 hours. 24+ hours is pretty extreme even for someone who usually sleeps through without a potty break (not me - it’s rare that I don’t have one bathroom trip during the night).
I vote for “got up, absentmindedly let the dogs out while she peed, let them back in, stumbled to the couch, then woke up hours later without remembering anything”.