I tried it once with my sister and now I can’t stop

Once you step on the slippery slope of incest, it can be very difficult to get off it. This is what happened with this guy, who decided just once to succumb to the persuasion of his anxious sister and let her communicate with his pussy. But it quickly became clear that this bitch was not going to limit herself to just one time. Now every time her parents aren't home, she gets into his pants and gets down to business. And my brother doesn’t even know whether he should be happy or sad, everything is so unusual that it’s fucked up.