Apologise: A sister’s urge

My name is Kate. I am 24 year old and work in a local bank. I live with my brother Jason and my mother.I have been living in Los Angeles for the past 4 years.My father serves the army and comes to home for a short period of time and my mother never really stays at home. She is always busy with her business tours so I have to take care of my brother. I love my brother very much.He means the world to me. The reason behind is that he is different from others. He is younger than me but he knows me more than anyone else. He is always there to cheer me up when am sad and tries to help me in every possible way. But one day, everything changed between us
It was unlike any other normal night. I got a text message from my best friend about the party in her house. She wanted me to meet a person who could help me in getting a job. I like to be the point of attraction in parties so i took a long time to get ready. I took a white blouse that had a tailored fit. It wasn’t exactly see through but, as i looked in the mirror, the outline of my black bra was clearly visible. Because it was a tailored fit i left the top buttons undone to reveal my ample cleavage.. I wore a black split crotching panty. My pussy was clearly visible through the panty. Then i slipped on tight white trousers. But then i thought trousers were too tight. I changed the trousers for white skirt that buttoned down the front. I fastened only the top three buttons and sat down on the bed. The skirt fell open and it barely covered my pussy . My complexion is dark and tanned so i didn’t need tights or stockings. I finished the outfit with black high-heeled shoes and went downstairs.
Jordan was in his robe on the sofa. He looked up as i entered.
“How do I look dear” I asked.
“Like always! Beautiful” he commented. Jason never really used the words like sexy, hot. So I had no choice but to adjust with the word beautiful.I cannot call him nerd because he was not a bookworm yet he took studies very seriously. He never really go to the parties or date any girl in his class. I guess except me there was no other girl in his life. And he was a virgin for sure.
“ok dear. I will not be able to make home early. So don’t wait for me and have dinner on time” I said and left the house. I was in the party and was busy talking with my friend when I got a call from an unknown number.He told me that he is Jordan’s friend. When I asked him the reason for calling me he told me that he saw Jordan making out with a boy today in the school and he thought that I should know about it.When I tried to ask his name, he disconnected the call . It really freaked me out. I knew that it was not true but I was not sure either. So I decided that I would talk about it with my brother after I reach home.