I can no longer interact with Cece to increase my relationship.
They have started working on adding new races to the game, but only the discord would know what's been decided on to be added. As far as increasing Cece's relationship goes, her relationship meter doesn't increase past 8, but in 4.1, you can continue a questline with her through the mother's relationship questline.
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.