Ling was rather agitated from this (she had gone upstairs) and hissed when I approached her. She calmed down when I sat with her and everything seem better. They even ate dinner together!
Later, Cosmo was playing with me on the bed when he suddenly stopped, and then started to puff up slowly while staring at the door. When I looked, Ling was at the door, also puffing up. Before I could stop them, all hell broke loose, yowling and screaming along with the pee fountain (this was at 3am!).
I managed to shut the door when Cosmo ran out while Ling stayed with me for the night. There is no change in the aggression today. I've had to keep them separated (one stays in the room with me while the other gets the rest of the house and after a few hours, they switch places). I did bring Cosmo into the room to sit on my lap (the both of them are their normal self when alone with me) while Ling was on her scratching post and she was furious. Although I made sure they did not stare at each other, Ling still got into a massive hissy fit and Cosmo who was quiet at the beginning, started to growl then hiss.
|Cosmo : WHO GOES THERE!|
|I'M AFRAID AND CONFUSED! GO AWAY! PLEASE, JUST GO AWAYYYY!!!!|
Mummy : The pictures are not meant to show that Ling is the one being difficult. The both of them hissed at each other but I only managed to capture Ling's pictures as I was on the way out with Cosmo. She is probably very afraid as this surely brings back awful memories of the first episode
Here's some information on feline redirected aggression.