Yes, this is not ok

As Amy lets her lips touch mine, I also feel her hand start to press down and try to slip under the waistband of my bootyshorts and panties.

I grab her arm and turn my face sideways breaking the kiss. "Amy what is the matter with you? We are sisters and here you are trying to make out with me and get into my panties. WTF?" I yell out angrily.

I see her looking at me, shocked and kind of scared "immm sorry, I just thought maybe this is what you needed..." she gets out. "Yea I definitely needed my younger sister to kiss me and try to slip her hand into my panties, of course. What would Mom and Dad think?" I blurt out.

Amy stands up upset and walks to her room, when she is up the stage I call out "WAIT!" but I hear her door slam and I know that is the end of seeing her for tonight. I realize that she probably thought that she was helping out and that I probably was a bit harsh on her.

As I drag myself upstairs, I feel pretty shitty about yelling at Amy, but I get to my room, shut the door, change into my pajamas and fall asleep