I don't like Cecilia's and her mum's behaviour. They are literally leading Yuki on like an absolute chump... And Cecilia's total obedience to her mum is simply moronic. Like she told her "Don't meet with Yuki for 1 month" or however more and Cecilia bloody accepted it with minimal to no protest.
Furthermore she has not definitively shut down the stupid hero's advances, apart from his marriage proposal which BTW happened off panels so we don't even know how it went down. But clearly she left things open, enough for him to continue pursuing her.
This is just dogshite honestly.