She's my TWIN sister.
The Big Bang Theory Season 1, Episode 15
The Crown and the Faith
are the TWIN pillars of the world.
Game of Thrones Season 6, Episode 3
Penny, this is Sheldon's TWIN sister.
Missy, this is our neighbor Penny.
The Big Bang Theory Season 1, Episode 15
"Made up my mind to date both of them
by pretending to be TWIN brothers."
The Big Bang Theory Season 9, Episode 14