To prevent herself from getting into further trouble, Melody relayed the information about Kayla's slap to Adriana, who then tasked her to do the needful. The former couldn't be any happier to exercise her muscles after a long time of inactivity.
Adriana knew what to expect, as Melody had been cooled up in the house, and following as her chauffeur when the girl would prefer a little more action. She knew the peacock would get what she deserves for laying her hands on someone she shouldn't.
Kate would bite her fingers off if she ever knew that Kayla was the reason for her imminent suffering.
Adriana has already considered Kayla as one of her own after she saw the sincerity in the girl's actions. She didn't want to toss her around or be fake around someone who was genuinely sincere to her.