A storm started again and they were left with only each other, two hidden kwamis and a umbrella Marinette always kept with her.

This is right after glaciator 2.0

Spoilers if you haven't watched them, in a way.

Kagami spills wie in her Mom white valentino bag, and her Mom gets accumatized!! that's when she needs her partners (wink wink) has to transform and save her!! Afterwards kagami needs to confess her feelings to them both oh what shall she do.