I love how the father and son have that connection of being terrified/loved by the mom. I really enjoy seeing his mom in this, I agree with a lot of other people, that she pretty much makes this manga soo much better. I mean her absurd strength is cool and all, but just how she is in general.. I smile every time I see her in the chapters, because I know she's about to hear some crazy news about her son and make the messenger piss himself.
Edit: If there is a LN or WN I haven't had a chance to read it, nor have I scrolled down to check other comments. So... I'm saying he's going to have a younger sister. I'm not saying it because of the "FLAG" that was shown at the end of the chapter.. It's more like, because I want to see the MC get onto his mom(punish her similar to how he forbade her from training/riding horses/etc..)for trying to raise her the same way she raised him. I mean come on, seeing the character that everyone is afraid of or that can go berserk any second is getting "punished" by her son... Its pure gold.