the way my jaw dropped at the last panel TT this gon' be gooood
i dont think she's the younger sister, rather she is the older sister. in the raws she's tall and looks more matured compare to the son of the duke.
Maybe she is the younger sister of the Duke, so she is the aunt of the son of the duke
she's the duke's sister. the son called her "aunt" and the fl also introduced her as callen's younger sister
hello ╮( ̄▽ ̄)╭
the way my jaw dropped at the last panel TT this gon' be gooood