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

Chapter 30 Katelyn POV

I spun around and saw Severus right behind me.
"I didn't know you could play piano", he said.
"Well now you do", I said. Then I stood up and made the piano stuff disappear. I walked out to the hallway knowing that it was time for dinner. I had my Slytherin robes on and I sat away from everyone else like usual. Harry looked over at me and so did the Wesley twins. I waved at them and did the secret signal to them that meant to meet me outside the Great Hall once I left. They nodded and I turned my attention to the staff table where Severus was giving me a scolding look. Then the feast began. Then after I finished I stood up and left. The twins and Harry followed shortly after. We snuck into Dumbledore's office and waited. Then I heard Dumbledore come in but he wasn't alone. Then I peeked from my hiding spot to see Dumbledore and Samantha doing an arm wrestle. Then once Samantha won they tackled each other to the ground. I was horrified. I glanced at the Wesley twins who were petrified and Harry was looking at me.
'She is my twin sis', I mouthed to Harry.
'Oh now it makes sense on why Dumbledore is making out with a student', Harry mouthed back. I nodded and then I saw Severus come into the office and look petrified at the sight. He slowly backed away. I snickered but he heard and looked in the room. I let out another laugh and he looked in my direction. He saw me and so did Samantha and Dumbledore.
"Crud", I said. I stepped from my hiding spot.
"What are you doing here, Katelyn", Severus asked.
   "Well there is nothing like a good prank but Albus came back too early", I said.
   "Is there anyone else here other than you", Samantha asked nervous of anyone else knowing. I decided to cover for the boys.
   "Nope just me", I said, "this prank was one I would've had to alone."
   "Ok", Samantha said sighing.
   "Hey you want to go for a walk...the four of us", I suggested.
   "Sure", Severus said. The three others walked out but I trailed behind. Then the three boys came out.
   "You are lucky I am covering for you...now you better get out before they see you", I told the three boys. I ran to catch up to the others.