I find this series delightful. I find that I can feel empathy with the main character (MC) while still thinking that his mental strength is weak. I also like Yandere characters and this series is full of people giving off that aura. To top it all off, I can see the main character building up a word class train wreck through a mixture of unawareness and weakness, but is just aware enough to feel utter terror.
I will be interested in the mothers next move, her stand was reasonable but the atmosphere feels like she is quite willing to become unreasonable. He should have defied her directly, it probably would have been safer and would have at least left the mother thinking he could be trusted.
However, he is terrified and infatuated at the same time, poor guy. I almost wish I was in his shoes, the feeling of impending doom is wonderful and trying to find a path to survival would be a real trick.