The woman in the red shirt (Betty) who fought back is a lesbian in Canada during WWII. She was out with her lover when a group of men —strangers — started harassing them on the street, and when she fought back she was afraid her relationship with the other woman would be outed.
The woman all in blue is in charge of their shift, and she’s been tough before, and is a pretty big stickler for the rules.
I’m pretty sure Betty thought she was getting publicly fired, and instead Lorna gives this speech to stop everyone from gossiping about Betty, turning what she did — fighting back — into the heroic act it is.
God this scene is important to me. I nearly cried.
In other news, you should watch Bomb Girls.