Okay, thanks for the heads-up. I tracked down a TV Line interview, where they annoyingly render it as "Mom" instead of "Mum."
I was annoyed that Dr. Linda was so confused by the idea of Lucifer and Amenadiel being brothers "somehow." Hasn't she ever heard of adoption or remarriage? It shouldn't be that inconceivable for two people of different ethnicities to be siblings. I hate it when fictional characters act as though adoptive relationships or mixed families are some kind of bizarre, alien concept, like biological children/siblings are the only kind that can possibly exist. It's not only staggeringly ignorant, given how common such things are in real life, but it's hurtful, because there are so many orphans who need a good home but don't get one because so many people in our society don't even consider adoption as a possibility. (I've always been deeply irritated by ST:TNG's "When the Bough Breaks" and its complete failure to consider that the Aldeans' infertility crisis could've been solved quite easily just by putting them in contact with a good adoption agency. It's insane that so many TV writers don't seem to even be aware that there is such a thing as adoption.)
And yes, of course, Lucifer and Amenadiel are not adoptive siblings, but my point is that any sensible person seeing two people of different races calling each other brothers would assume they were from an adoptive or mixed family rather than freaking out over it as if it were some inexplicable mystery.
