YOU SAID:
she is happy with other
INTO JAPANESE
彼女は他の幸せ
BACK INTO ENGLISH
She was happy for other
INTO JAPANESE
彼女は他の幸せだった
BACK INTO ENGLISH
She was so happy the other
INTO JAPANESE
彼女はとても幸せだった、他
BACK INTO ENGLISH
She was so happy the other
That didn't even make that much sense in English.