YOU SAID:

I hit my mom and killed her and then killed my sister

INTO JAPANESE

私は母を殴って殺し、それから妹を殺しました

BACK INTO ENGLISH

I hit my mother and killed her and then my sister

INTO JAPANESE

私は母を殴り殺し、それから妹を殺しました

BACK INTO ENGLISH

I beat my mother and then killed my sister

INTO JAPANESE

母を殴り、妹を殺した

BACK INTO ENGLISH

Hit my mother and killed my sister

INTO JAPANESE

母を殴り、妹を殺した

BACK INTO ENGLISH

Hit my mother and killed my sister