YOU SAID:

i slept with you're mom

INTO JAPANESE

私はあなたがお母さんと一緒に寝ました

BACK INTO ENGLISH

I slept with you mom

INTO JAPANESE

お母さんと一緒に寝ました

BACK INTO ENGLISH

I slept with my mom

INTO JAPANESE

お母さんと一緒に寝ました

BACK INTO ENGLISH

I slept with my mom