YOU SAID:

i just peed in my sisters bed

INTO JAPANESE

私は姉妹のベッドでおしっこをしました

BACK INTO ENGLISH

I peeed in sister's bed

INTO JAPANESE

妹のベッドでおもらし

BACK INTO ENGLISH

Peeing on my sister's bed

INTO JAPANESE

妹のベッドでおもらし

BACK INTO ENGLISH

Peeing on my sister's bed