I got dumped by my girlfriend and I was insanely horny and just wanted to fuck. So, without even seeing her face, I thrust my erect penis into the defenseless ass that was thrust out and started pistoning hard, ejaculating inside. Ah, I thought it felt good, but it turned out I had inserted it into her sister's pussy, so it was definitely a life-or-death situation! But it seems like I lit a fire...