YOU SAID:

Maybe she was out late just head back from the club

INTO JAPANESE

たぶん彼女はクラブから遅れていたかもしれない

BACK INTO ENGLISH

Maybe she might have been late from the club

INTO JAPANESE

彼女はクラブから遅れているかもしれない

BACK INTO ENGLISH

She may be late from the club

INTO JAPANESE

彼女はクラブから遅れているかもしれません

BACK INTO ENGLISH

She may be late from the club