YOU SAID:

she asked me "son when i grow old, will you buy me a house of gold?"

INTO JAPANESE

彼女は私に「私が年を取ったら息子に金の家を買ってくれる?

BACK INTO ENGLISH

She asked me, "When I get older, will you buy my son a house of money?"

INTO JAPANESE

彼女は私に「私が年を取ったら、息子にお金の家を買ってくれる?

BACK INTO ENGLISH

She asked me, "When I get older, will you buy my son a house of money?"