Because they think they're useless since they marked each other, they were tagged as traitors.
IIrc female lycans mate once & for life so they have no use for the parents since they have chosen each other as their mate. However, the kid obviously didn't have a mate yet, so he's a free game.
Well the kid marked Lee Hwa when he was a kid, and the lycans didn't kill him. The lycans were acting as if they can overcome the marking so they could have done the same with the parents.
I would argue that Hyun marked Lee Hwa when he was already captured by the lycans -- he wasn't marked/mated with anyone when they got him. My theory is having marked someone is not as final as mating, so maybe they hoped they still had a chance, I dunno (￣∇￣")
They had to erase the kid's memory because his mate(Lee Hwa) wasn't around and it was affecting him.hard. That's why they had to make him believe he is a male. I'm pretty sure the marking was serious.
If erasing could work, they could have done the same with the parents.
ALSO they captured him AGAIN when he was pregnant. And they were still trying to take him back.
His parents being criminal doesnt change the fact that they are female lycans, aka useful for the lycans.
And they erased the part of his memory about him being a female lycan and changed it to make him think he was a male. He had already marked Lee Hwa so if they tried that on the kid, they could have tried it on the parents.
And even after the uke knew he was a female, still marked to Lee Hwa and even pregnant with Lee Hwa, the lycans still believes they can use him as their female. (It was even brought by the future heir that he could take the uke by force if needed). So it's still quite stupid they killed the parents.
Ok but wtf, why did the lycans kill his parents and not the kid????? Bruh
And why kill the parents at all??? Female lycans are rare asf, and you just killed 2 of em??? The fuck bitch, you psychos and stupids.