Dustin was too confused by his mother and Loki to be angry, now. Also, cuz of the explanation given to him by Tina about Xander's dark side, he had more or less accepted that Xander hadn't told him about his parents out of spite.
Remy definitely didn't want Keiko to leave. He was in a state of deep depression, due to once again having to put up with his split personality. He forced himself to get up and go downstairs, but once again didn't shave or bother to wear anything not crumpled.