Toilet Reaper's feed

If you don't like it, you can kindly leave. You don't need to leave a comment about how disgusting or weird it is. It's OBVIOUSLY a taboo and we all know it. They're both adults, not related by blood or grew up together, they're consenting (I hope so, I haven't read it yet) and come on, 15 years and that bad. Edit: it's literally in the first panels that the mc is 24 and has been living with the "stepdad" for 3 years and that he never considered him his father. He married his mom 8 years ago, so the mc was 16. And then lived together at 21+ so where's the issue?