Weeks passed since Erich first returned home with two Oni women by his side. And during this time his mother had moved out along with his younger siblings, and back to their homeworld of Alemannia, which had recently been restored to a state that was habitable.
As for Erika, she continued to struggle with Erich's infidelity, and his complete and utter lack of care for her. However, she was not alone in this regard. As Ayumi became increasingly concerned about the relationship that Erich had with his wife.
And though, Yumi kept telling her great niece not to bring up such a troubled subject around their lover. As the days passed, and Erich's indifference towards his wife continued, the kind hearted soul that belonged to the exiled Oni Princess could not help but attempt to repair the damage.