Always Stuck in the Middle

yeah, i too am a middle child in a weird way. both my parents where married befor they married eachother and each had 2 kids. when they married they had 3, me being the oldest of the 3. so that makes me the middle of us 7. But my sister is the middle of us 3. She however gets the most attention of any of us. she always knows things befor me, my mom always includes her in things she does and i never get invited unless my sis accidently says something and then she has to invite me. i have never craved attention from my parents but would like a little