who will carry the blame

Mo Qiang heard Mo Xifeng's scream and turned around to look at their mother, she did not expect more than ten vines to attack Mo Yan at once which was why her pupils contracted in fear as she turned on her heels and rushed towards the vines with Mo Xifeng.

If Mo Xifeng had been alone, she would not have been able to deal with the vines but with Mo Qiang helping her on the side by chopping up the thick purple vines, they were able to rescue Mo Yan without her getting injured. 

With her machete in hand, Mo Qiang put another spurt of strength in her hands and then chopped the final vine which still wanted to attack Mother Mo and turned to look at Mo Xifeng who was helping Mo Yan up from the ground.

" What happened ?" Though the human-eating vines were indeed a bit crazy they did not attack just one person, so why did they attack Mo Yan out of nowhere?