It's not a big deal. It's just ever since
Leonard's been dating Raj's SISTER...
The Big Bang Theory Season 4, Episode 23
No? Catelyn Stark begged her SISTER
for support, and Lysa refused.
Game of Thrones Season 4, Episode 8
It appears your SISTER lied to me.
Game of Thrones Season 8, Episode 2
To create strife between my SISTER and me.
Game of Thrones Season 2, Episode 10
You know your SISTER better than I do.
Game of Thrones Season 2, Episode 2