YOU SAID:

she be my queen since we were sixteen

INTO JAPANESE

私たちは16歳だったので彼女は私の女王になる

BACK INTO ENGLISH

Because we were 16 years old, she will be my queen

INTO JAPANESE

私たちは16歳だったので、彼女は私の女王になります

BACK INTO ENGLISH

Because we were 16 years old, she will be my queen