That blonde idiot is on the same level as "the heroine" from- I'm Not a Villainess!! Just Because I Can Control Darkness Doesn't Mean I'm a Bad Person!
Dumb, open about her intention, acting like a dumb child, treating the world like an easy game.
Her defeat will be swift, the cousin does not even like from the beginning and bad-mouthing the mc put her in the negative.
Edit- The translation quality was readable, the real problem were the pacing.
This entire chapter could have been dealing with the father, second chapter on her cousin but decided to fuse it.
Very bad, but I guess we are not to take this seriously anyone with a dumb antagonist like that.