This takes place before Cherry's sacrifice. They both enjoy it when Heather shows off like this. Cherry is secretly happy to be dominated.

Picture by https://www.deviantart.com/stmercy2020

As a note about the proceedings in the Hackerman story; sacrificing yourself to stop an epic, well-known evil is heroic, but doing so to save others from an an unknown threat, so that they will never have to experience it, is even more heroic.