The Secret Sister

Andy's POV

I walked onto the bus, I had just gotten off the phone with Juliet and picked up CC's little sister Nina who was talkign to Jinxx. I needed to find my sister Nina had been looking for her. I checked in the bunks. Nope just a sleeping Ash.
Where is she?!
I was about to leave when I heard shuffling in the back lounge. So, I turned around and opened the door. There laying under a blanket with my best friend was MY 18 year old little sister, kissing him.
"What the fuck CC?!" I yelled looking at them. I wanted to punch him in the face. I walked over and grabbed him.
"That's my sister, she's off limits" I said pulling my hand back.
"ANDY DONT!" My little sister yelled at me. I dropped CC and stumbled back. What the fuck did I just do?
"Are you okay baby?" My sister said as she sat down by him. He nodded back. Thankgod hes okay I'm glad I didnt hurt him.
"Angel, I'm sorry" I said about to touch her back. She wiped around.
'ANDY LEAVE NOW!" She screamed at me in tears. I walked back out of the bus. Why did I just do that CC is one of my best friends. What is wrong with me? I sat down against the bus.
"You okay Andy?" A familiar Voice said. I looked up to see Ash.
"No, Angel and CC were kissing and I got pissed and flipped Ash. I about punched him." I said hanging my head.
"Andy, just give her some time everything will be okay" Ash said sitting next to me.
*30 minutes later*
UNKNOWN POV
I look at the bus to see CC and Angel walking out CC kissed her as he walked out. That's my Angel no his. I love her not him. She will be mine someday. I know your brother wont mind us dating he likes me more than CC.

Notes

Who do you guys think is the Unknown please let me know.