User blog comment:Roranoa Drake II/Chapter 874: The Baum Goes Ablaze/@comment-24850639-20170804154725/@comment-24850639-20170804181335

Oda's jerked us around too many times for it to not be forreal this time IMO. However, Chiffon helping means that it halts the FireTank Pirates escape too. I'm not sure what that means for Luffy's relationship with Bege. Luffy taking on the brunt of Big Mom's rage despite Bege being the one who plotted the assasination in the first place, should help endear him to Luffy, but it'll really suck if him helping out means that some of his crew gets hurt. I really liked the note that things ended on between those two, I'd hate for something like this to sour it.

As far as BM leaving the Straw Hats loved ones alone, the only way that seems possible to me is if Pudding erases her memory of the Straw Hats ever showing up. Otherwise I'd imagine they would be the first people that she attacks once they escape. Perhaps Oda could also just never bring it up again, but that doesn't seem likely when BM threatened Brook that everyone he's ever known could end up dead because of their meddling.