It really doesn't matter, That's your half sister and you literally still had sex with your nephew. No. ( ̄へ ̄)
I would worry ofc. But I will sure talk things out first before going straight by telling them to break up cause I know it's not that easy especially if strong feelings were involved.
as u see, the boi also cut his wrist caused by gis broken heart. This means, they have strong feelings for each other that it causes the boi to commit suicde.
Suicide is sad, upsetting. But it's a selfish act. You just can't kill yourself just because life wasn't the way you wanted. Sorry that life isn't all rainbows? Sorry actual life is hell? People think by killing themselves they will be free. No. Sorry. You won't. Instead you'll pass that depression you had onto others because you killed yourself?
FATHER MATERIALL!!