I waited until getting home from work Wednesday before I would bring up her teasing Tony again. After we ate we were sitting watching TV and Amy went ...o the bathroom and came out and told me her period started. That shot my plan all to hell and knew it would be at least a week before anything happened again. I waited until her period ended before I even brought it up to her. It took a lot to talk her into it but she finally said she would do it. I just wanted to see her tease Tony again. I was. Santiago is friends with my roomie so they eventually go out for drinks . One night my roomie was gone upstate for the weekend and the bell rang. Santiago was downstairs apparently he was locked out of his apt and needed a place to sleep. I was watching porn and smoking in my room horny as hell. i opened the door and he came in what i forgot was to turn off the loud porn that was going on in my room. Santiago heard the noise and laughed and asked what i was watching, i blushed and pretended not. After all, we reasoned, we weren't planning on spending any time awake in the cabin.. My suitcase was there, but Alice's wasn't. I wondered if she'd handed hers over at a different security point, so it was taking longer to get here. Just then, my phone binged. A text from Alice: "Sorry, Jason booked last minute trip to Vegas for us, so gotta bail. Sure u'll meet lots of gr8 people. Have fun!" Fucking bitch! We'd been planning this cruise for over six months, now she dumped me at the last. I moved to cover up my private part but she slapped the side of my side of my leg making me wince in pain. "Stand still, Tony. Hands back on your head until I tell you to move" My face turned a deep red I realized I was utterly powerless before my sister. Here I was, a 17 year old teenager standing in-front my sister with nothing but a t-shirt and white undies on. "My my... A little excited are we?" Kara laughed as she pointed out my full-blown erection. My bulging erection was captive inside.