Yuusha ni Zenbu Ubawareta Ore wa Yuusha no Hahaoya to Party wo Kumimashita! - Vol. 4 Ch. 16

[Primalmoon]

While this whole setting feels implausible, the real implausibility here is that Ceres managed to find all of these slaves with the exact characteristics that would annoy their new owners while also looking like the daughters. That's the part that kills my suspension of disbelief.

 

[KyuubiUzumaki]

This is a subtle revenge that in no way hinders the Hero's Party unless they fail to defeat the Demon King. There is probably some obscure law that directly harms the Hero in a way that lessens his chance of defeating the Demon King, which is grounds for imprisonment or execution.