Look from the begin, while bidet comes down, first meets a woman with green dress and happily bumps her, then she points to Milley and Milley turns like to talk with him and moves the hand (i think wanted to bump / shake his hand) but bidet briefly looks at him and then takes up the finger in a way like ' i know what you did ', and ignores him moving on (and only then Milley waves like a 'wait' or 'hold on' to someone, seen the eyes trajectory maybe was to Kammalla)

But look their facial expression looks like bidet is hungry and Milley worried, indeed something is odd