Despite them all being together, Annalise is still tired from literally saving two lives, and will not be rising to Frank's snarky comments. Frank will quickly learn not to mess with someone who has had no sleep.
Yes, that is Annalise and Frank next to Laurel in the hospital. It just goes to show that even the most dysfunctional of families can come together in the midst of a crisis.
Annalise resolves to certify her class action lawsuit on How to Get Away With Murder. "Nobody Roots For Goliath" is the seventh episode of the show's fourth season.