Are there any plans surrounding the mystery surrounding the incidents experienced by her husband and son in the past? if anything, I was reminded of manga by Inomaru such as Camellia or Itazura Senyou Hanahira Seitokaichou, where the characters have a strong determination. Like, the mother may have been forced or even enjoyed her fate now being treated like a cumdump, but once she heard something suspicious about the incident she strengthened her resolve and played along to investigate and intend to take appropriate revenge on the savage responsible for the incident??
Or a story like A Mother's Love by Shinozuka Yuuji?
sorry if there are too many h-manga references,,,,
Its a great game, Bang!