Iki Jigoku ni Ochita Kazoku no Game The Animation – aniSearch.com

Toxic motherhood is often characterized by a pattern of behavior that is abusive, neglectful, and controlling. The toxic mother may use manipulation, guilt-tripping, and emotional blackmail to maintain power and control over her child. This behavior can be rooted in the mother's own psychological distress, such as anxiety, depression, or personality disorders. In turn, the child's responses to this behavior can perpetuate the cycle of abuse and control.

Given the translation, it seems like the phrase might be related to a situation where a mother is involved in some kind of problematic or abnormal behavior, and there's an update or development in that situation.