"Understood," says Abrogail Thrune II, reigning Queen of Cheliax, and bows her head submissively.
She hasn't actually had a chance to consider the implications of Gorthoklek's authorization, which is not particularly written in such fashion as to exclude Abrogail Thrune from the scope of Hell's command. Abrogail would as soon not do anything with anything Asmodia she can't undo, before she's had that chance to think, and this pathway does least.
Besides. It potentially sets up an interesting reveal later.