Reunited with Ahopkin

It had been awhile, but Ahopkin has found a good home. Sara and I took him out to the playground and played. Then Ahopkin met his first cat in the wilderness. This was also the first cat Ahop had met since Ludmila, his sister. When he was reunited with Ludmila for the afternoon, they hissed and spat at each other. What went wrong? Had they forgotten about each other, or were the bad memories of being seperated, and the promise for renewed seperation too much to bear? (See pictures of Ludmila and Ahop in sailor's hats.)