YOU SAID:

She was looking kind of dumb with a finger and a thumb in the shape of an L on her forehead

INTO JAPANESE

彼女は彼女の額にLの形をした指と親指で馬鹿にしていた

BACK INTO ENGLISH

She was stupid with her finger and thumb in the shape of L on her forehead

INTO JAPANESE

彼女は彼女の額にLの形の彼女の指と親指で馬鹿だった

BACK INTO ENGLISH

She was stupid with her fingers and thumb in the shape of L on her forehead

INTO JAPANESE

彼女は彼女の額にLの形の彼女の指と親指で馬鹿だった

BACK INTO ENGLISH

She was stupid with her fingers and thumb in the shape of L on her forehead