The AU is based off doodles/ideas from Here! Where basically she's "in a goth rock band with her cousins and Gosalyn is a fan of her music. But the band doesn’t make much money, so Morgana moonlights as a supervillain".

And yes, you are not wrong to say ULTIMATE INFURIATION because there can and will be violence when Della finds out the two most annoying men she knows are one and the same. much violence.