Mona's defection ought to have immediate and major ramifications if Camila can't talk her out of it.
If Mona leaves the HOTs completely, Sage and others will want to know why. If Mona doesn't leave the HOTs and is just pulling out of Quinn's restaurant, then she will have little reason not to spill the beans on Quinn.
Quinn's secret is definitely going to come out at some point, but I don't see that happening before the end of the HOT Scavenger Hunt. So either Mona will grudgingly fall back into line, or Camila will beg her to keep silent about the whole deal for Camila's sake. The former seems more likely to me, since the latter paints Camila in a less flattering light.
To me, this suggests that Camila will be able to talk Mona back into the fold, at least for a little while. Long enough for Maya and Josy to complete their list.