Thanks for the chapter!
Not sure where Aisha is, but she wouldn't risk endangering any cute cats so doubt she had anything to do with this. Besides, would've contacted a human army since has human contacts not demon ones, and a demon army would likely kill her too as she smells human along with her being too scared of MC going against humanity to risk spurring him on. Mamon, however, seemed to ready to leap at an excuse to rebel as didn't bother to verify himself or accuse MC of being human. Also, I believe they mentioned that he's in charge of the barrier so it failing while an army shows up at a place that he's one of the few who know about it seems pretty convincing to me. Although will have to see what MC and others find out before can say it was x 100%.