Young sibling's behavior becoming more promiscuous

The video starts with a POV shot from the bedroom of a young 18-year-old guy. His younger sister, 17 or 18, is in the room with him and they start talking about their sex lives. It seems like they're both experimenting and trying new things, which is pretty cool. The guy's sister tells him that she's been having sex with other guys, not just her boyfriend, and he's clearly surprised by this revelation. She then proceeds to show off her big ass, which is definitely worth checking out. The video ends with the guy watching his sister fuck another guy, but it's not his brother. Overall, this video is a pretty interesting look at the sexual exploits of a couple of young siblings.