[Stepbrother and sister x sharing a room x insatiable sexual desire] I unexpectedly ended up sharing a room with my brother who was born after my parents remarried! One morning I woke up to a stain on the bed that I didn't remember and something sticky on my crotch... The next day, I woke up with a strange feeling in my crotch and my brother was licking me! We were going to be brother and sister...! Even though I tried to resist, I couldn't help but cum from the pleasure. Unable to escape from my brother's insatiable sexual hold, I crossed the line and continued to have sex behind my parents' backs, and as I convulsed and squirted, I gradually began to feel attached to my brother's unstoppable sexual desire...