Momo is a deviant woman, her possessiveness and envy stronger than anyone else's. What she cannot obtain, she will destroy ruthlessly rather than let others have it. This is exactly why she is so desperately trying to kill Luo'er; at the very least, she wants to maim him. That way, even if Moumou gets Luo'er back, he will only be an imperfect Luo'er.
Luo'er's body fiercely twisted, throwing Tangmo, who was riding atop him, to one side. While being beaten, he had already grasped the dagger, inserting it between his hands. Struggling to sit up; he then forcefully slid the dagger. Instantly, the sharp dagger severed several ropes and bindings, his hands weren't completely free yet, but he had created just enough space for manoeuvring.
