Through thick and thin (Katelyn Hollow X Severus Snape) (HP fanfic)

Chapter 3 Severus POV

   A giant paw batted behind the chair leg and caused Katelyn to go unconscious. The cat disappeared and I ran over to Katelyn. Her body was completely limp. As I stood there I noticed that she wasn't really young enough to be a student. She was older. Then there were thudding footsteps.
"You said this is where they disappeared", Dumbledore asked.
"Yes", Harry said. Then I ran around the chair leg and looked up at the two.
"50 points from griffindoor", I yelled. Then Harry looked around.
"You heard that right", he asked Dumbledore.
"Yes I did", Dumbledore said. Then Harry looked down and saw me. He laughed.
"Dumbledore, I found Professor Snape", he said still laughing. Then a cat came in. It was a calico with one blue eye and one green eye. Then Katelyn staggered over. I didn't even notice she got up.
"Maddy, come here baby girl", Katelyn said and the cat came to her. She patted the cats huge head and it let out a soft meow.
"Good girl", she said, "good thing you are well trained." The cat meowed in agreement. Then she did a small movement with her hand and the cat laid down.
"Well", she said looking at me.
"What", I asked. She climbed onto the cat to ride it.
"Are you going to try to walk all the way there or are you going to get on so you can keep up with us", she asked.
"Whatever", I said climbing onto the cat. She let out a small laugh and I glared at her.
"Where is the counter potion", she asked me.
"In my desk", I said.
"Ok Maddy got to the desk", she said. The cat walked over to the desk and jumped up. I hoped off and realized that Harry and Dumbledore were gone. I walked to a small bundle of potions on my desk and searched for the right one. When I found it I motioned for Katelyn to come over. She came over and helped me knock it over. The liquid poured out of the vial and we went back to normal size. Katelyn picked up the cat and walked out silently. I cleaned up the mess on my desk from the potion spilling.