Weird? You speak as if yisu currently sharing father and son isn't weird lol oh just a normal day where a man fucks the father then goes and fucks the son. Yep completely normal routine.
Jokes aside, my vision if it's already this fucked, why not go all the way and enjoy themselves while they're at it. Plus they're not fucking each other, they're fucking yisu, the main piece that will unite their relationship ٩(๑❛ᴗ❛๑)۶
Not sure why this was your response if you read my other reply. I argued against calling the threesome weird BECAUSE I think their relationship IS ALREADY weird enough as is that they might as well go straight to threesome next and it wouldn't matter. (To spell it out in case you miss it again, I'm saying they are weird af already. No point in drawing a line at a threesome.) I have no interest in y'alls morals or whatever analysis about the characters. That shit is out the door the moment he fucked the dad. Have some fun and just enjoy the mess that is happening.

When are we getting to the threesome lmao
I know it's coming. It's obvious yisu is gonna be the key that brings the cheater and homophobic man to some semblance of an agreement.