Ripping My Sister's Tights and Fucking Her On Yoga Mat

It seems like Kiarra, my step-sister, is incredibly attractive. Watching her engage in yoga stretches is a delightful sight. Today, she caught me observing her discreetly.
I admitted to her that I find it challenging to concentrate knowing she is in her room flexing and leaning provocatively in her leggings. I moved in closer and began touching her firm buttocks. Overcome by desire, I abruptly tore her leggings while she was on all fours.
I sensed her arousal, she desired me to penetrate her with my substantial manhood. I vigorously thrusted into my step-sister's wet vagina until I reached climax inside her.