Young step sister's obsession with my manhood

The first time I was alone in the house with my new girlfriend's sister, I could see the lust in her eyes. She kept staring at my bulge, not even trying to hide it. I knew then that she wanted to suck my cock. I also knew that she would do anything to make it happen. As soon as we were alone, she started unzipping my pants, her hands trembling with anticipation. I let her take me deep into her mouth, her tongue dancing around my shaft. After a while, she stood up and spread her legs, inviting me to penetrate her. I did it without hesitation, fucking her hard and deep. Then, I turned her around and took her from behind, pounding her ass with wild abandon. After a few minutes, I filled her cute little ass with my cum, marking the end of our passionate encounter.