OMG. You need to tell your sister to step off. That is not appropriate. Getting into the shower with you? Damn. She wants you homie :O
But yea I guees this behavior is not to abnormal though. Wheter we like to accept it or not, sometimes there is sexual tension between brother and sister. >_
I rememeber when I was in high school - I was at my best friends house and his sister (about 13 years old) walked up and said to her brother (with me there), "Wayne, would you fuck me?" I don't think she had a clue what she was asking, but she liked to hang out with us. So I am thinking your sis is just playful and curious.
And no we didn't fuck her, but I do like the way it sounds when they talk dirty.
But yea I guees this behavior is not to abnormal though. Wheter we like to accept it or not, sometimes there is sexual tension between brother and sister. >_
And no we didn't fuck her, but I do like the way it sounds when they talk dirty.