My destructive secret affair

Summer vacation just started, so my dad decided that we'd go on a trip to visit his sister and her family. I must say, I was really looking forward to seeing them again since I haven't seen my cousins in so long. I started dozing off not long after we climbed on the freeway as I had just writing finished finals and I was exhausted from all the studying.  "Katherine!, Kat wake up!" I heard as someone was shaking me. I forced my eyes open, feeling groggy. Man I must've been lights out. Turns out it was my sister ,Lily, waking me to tell me that we've arrived at my aunts house. It's exactly as a remember it from my childhood. We used to come here every weekend when I was young but then we moved to the other side of the country and we haven't been here since. The big wooden house was cozy yet modern with its massive windows, it had a porch that wrapped around the entire house which allowed 360 degree views of the forest it was nestled in..  "Katherine, my angel, you have blossomed so nicely!" my aunt Mandy beamed snapping me out of my daze. "Thank you, I have missed you all so much." I said blushing. She was right though, I had gotten past my awkward stage and filled out quite nicely. "Where's my girl?" uncle Charlie said running towards me with a big smile on his face. In a flash, he had me over his shoulder and started tickling me. "No, don't! Stop!" I squirmed so much while laughing until I felt like there was no more air in my lungs. After what seemed like a decade, he finally put me down and allowed me to grab my luggage, walking away to greet my parents. My aunt and uncle had 3 children. One was Amelia, who was younger than me, another was Nate, who was my age and then Luke who was 24 which meant he was 6 years older than me. We used to get up to no good whenever we got together. Smiling at the memories this house brought back, I walked inside to find Nate and Amelia playing PlayStation and "Hey" I greeted them quickly with a small wave before going to my parents room to put down my luggage which down the hall. The house had 5 bedrooms so my parents and Lily took the spare rooms.  As I was walking down the hall, I saw Luke on his bed with his tongue down a girl's throat. Eew! "Hey", I said awkwardly from the doorway. "Hey, Kat!" Luke said while pushing the girl off him to come give me a hug. 'This is Lea, Lea this is Kat." he introduced the two of us. He wrapped his arms around me and hugged me for longer than normal during which Lea was giving me death stares from the bed. Geez! What's that about?