For a few previous chapters, here in the comments I've seen some people saying that her punishment should be something involving rape, but DAMN, what happened here is much worse and totally appropriate for a bitch like that. Seriously, making her realize how lonely she really is, completely destroying her ego and only after that, letting her be eaten alive by bugs.
I hope the next revenges continue at this level or go even higher with psychological and physical torture. The entire group of bastards deserves this.
Ps: I hope that in the next chapter, at least, it will show Maria getting rid of the body (burning or burying it), just to give me peace of mind knowing that the bitch is really dead.