YOU SAID:

My but is filled with your mum and my step sister

INTO JAPANESE

私のお腹はあなたのお母さんと義理の妹でいっぱいです

BACK INTO ENGLISH

my belly is full of your mom and sister-in-law

INTO JAPANESE

私のお腹はあなたのお母さんと義理の妹でいっぱいです

BACK INTO ENGLISH

my belly is full of your mom and sister-in-law