Chapter 6.

Oh boy! So let me try crystal-balling: Bella either kills or turns Pera or is stopped before she can do fatal harm or bite. It's also possible Elspeth could suck out her venom should Pera be bit, I guess. Brady is sure to attempt steam-rolling Bella in any scenario, but Jacob should be able to halt that attempt quickly. Even if he can't or won't, Bella is very unlikely to die considering they'd have to be chill with dismembering her and then continuously lighting her on fire, all the while ignoring Elspeth fighting for her mother; something Jacob cannot do.

If Bella is somehow stopped before she can get at Pera, and is thwarted from trying to so again, then everyone except Elspeth will most likely be quite peevish with her. It's also very likely that Pera just so happens to be Bella's yummy singer. Either that or she was extremely hungry, which is also a possibility if she was stupid enough not to feed after reassembling herself. Elspeth also noted that Pera's blood smelled very good. Maybe mother and daughter have similar tastes. I imagine Bella will have some difficulties travelling with the pack should Pera be her singer, though it will do wonders for her self-control should she learn to resist her.

If Bella kills Pera, it is likely that either Bella or Brady will have to die, since Brady won't stop trying to kill her. The pack or what is left of them after this confrontation obviously lose the ability to 'hide' with Pera in this scenario; cue Volturi slaughter and slavery.

If Pera starts turning, and Elspeth either can't or is too late to suck out the venom, then they most likely lose the ability to 'hide' during Pera's transformation due to her not really being in a state to concentrate, and may also find themselves with quite a large contingent of Volturi on their heels during that time. When she wakes up she'll maybe be all kinds of more awesome than she already is, have a sudden desire to chew on all humans present, relationship issues with Brady and be a little peeved with Bella and life in general.

In both above scenarios, they're all very likely to suddenly pop up in a relatively seclusive location in the middle of NYC with a woman screaming her lungs out - or a dead woman, and a ravenous vampire doing her best to devour said woman. I'm going to bet on the latter scenario of Pera being turned vampire because Alicorn has already gone out her way to explain what would happen to a wolf-imprint relationship should the imprint be turned vampire. That and the PeraVamp and BellaVamp combo could be verrrra awesome should Bella actually learn how to use her witchcraft in any other situation than playing dead, and Pera could probably help her with that.