Friend had incest with his half-sister who is now his live-in girlfriend

A friend of mine told me that in high school he had an incestuous relationship w his half-sister. I don't think their parents were married, just living together, since my friend said that his sister was actually his half-sister. <br><br>According to my friend, the incest started with a visit to my friend's room to get a shirt or something and she ended up laying down with him on his bed... He claimed he didn't know what to do and it had already been a while since he had gotten intimate with a girl. Apparently my friend and his sister were both 17 at the time. He claimed that he didn't know what to do, that they hadn't been close as siblings and it wasn't weird to him at all, but that he still knew that incest was a taboo... And that he was curious, since he didn't know what it would be like doing incest with a sister...<br><br>He told me this story in the car as we were driving to a bar and I just nodded and told him it was wild in a neutral tone as I didn't know how to react. I was pretty shocked tbh but didn't wanna make him feel uncomfortable, so I kept my cool in regards to his confession... <br><br>He told me this story almost a year ago while we were going to a bar in my car and I haven't seen much of him in recent months since I moved to a different city, but just found out that he ended up dating his half-sister and they're currently living together...<br><br>This is some serious Silence of the Lambs stuff lmao.