That's just plain stupid. So that's the excuse for the mother to be ridiculously overpowered ? She was secretly training with someone even more broken ?
Where have you been all this time, letting your descendants fight and die in your place ? "Meh, stuff happened"... really nice enplanation, really. (Okay that's the next chapter, but the oint remains)
This manga has been going downhill for a while now... At this point I'm almost forcing myself to continue because there's only 50 chapters left.