Oh good. Sable gets out of bed, since there is still plenty of daylight left, and goes to get all her freshly-chopped cherry logs. It's time for a perilous staircase to die. RIP to whichever long-dead villager designed this thing, sucks to suck. She puts it all in a chest at the bottom, then fills her inventory with stair blocks and planks, and starts tearing it apart from the top. As she goes, she replaces it with a new wooden staircase. The shaft is five meters by five meters, with a central stone brick pillar, so she builds each flight of stairs three by two, with a one-by-five landing at each end, and an additional block of cherry planks in between the flights connecting each landing to the central shaft. A torch hanging from the central pillar illuminates each landing. She gets a vibration from the quest book on her way down, but ignores it in favor of finishing the job.
When it's all said and done, she looks upon her work proudly, packs away all the wood in the main bedroom, and strips off her clothes to fall into bed alongside her girlfriend.