YOU SAID:
when you think you sleep with her dad but its her grandpa
INTO JAPANESE
あなたが彼女のお父さんと寝ていると思うとき、彼女のおじいちゃん
BACK INTO ENGLISH
When you think you're sleeping with her father, her grandfather
INTO JAPANESE
あなたが彼女の父親と寝ていると思うとき、彼女の祖父は
BACK INTO ENGLISH
When you think you're sleeping with her father, her grandfather
You should move to Japan!