It's not about 'having sex w/ your parent' though, it's about having sex with the person you love (in a romantic way of course)
You do realize this is fiction right? I mean if you guys hate this because of a FICTIONAL RELATIONSHIP then it's simple for you to do this. Don't read and go read something else.
Yeah, 'cause obviously you hate this kind of incest so why bother comment or read it. (But I assume you did enjoy the father/son love story so no worries you're comment was just to hide your inner fujoshi delight.)
may be some of you will find me annoying but, i never get the "good side" of having sex with your own kids or parents. for me incest is too wrong and unaccaptable. anyway sensei's art and character development make the manga readable.