A game I recently learned from my cousin older sister—playing pretend sex. I don't fully understand it yet, but it makes my heart race and gives me a strange, fluttering feeling. Yet I'm drawn deeper into this sensation, and now I find myself begging my sister to play pretend sex every time I see her. We kiss, I gently lick and caress her tongue, then fondle and massage her breasts. With a breathless, exhausted expression, my sister straddles me and starts rubbing my cock. She whispers, "This is our secret, okay? Don't tell Mom and Dad." I'm not entirely sure why, but I know deep down that we're doing something forbidden.