How do I do this?
First, if you don't have version 4.1 of the game downloaded go to here:
https://www.patreon.com/BreedingFarm
and look under their about Team Bieno section. There, you will find a free download for their latest version of the game. Download and install it.
Next, go through Cece's relationship the same as you did before. Then, try walking through the house at night.