YOU SAID:

She sat on the window side of the outside

INTO JAPANESE

彼女は外の窓側に座っていた

BACK INTO ENGLISH

She was sitting on the outside window side

INTO JAPANESE

彼女は窓の外に座っていた

BACK INTO ENGLISH

She was sitting outside the window

INTO JAPANESE

彼女は窓の外に座っていた

BACK INTO ENGLISH

She was sitting outside the window