YOU SAID:

if feels good when she puts a finger in the buttocks

INTO JAPANESE

彼女がお尻に指を入れたとき気分が良い場合

BACK INTO ENGLISH

If you feel good when she puts a finger on the ass

INTO JAPANESE

彼女がお尻に指を置いたときにあなたが気分が良い場合

BACK INTO ENGLISH

If you feel good when she puts a finger on the butt

INTO JAPANESE

彼女がお尻に指を置いたときに気分が良い場合

BACK INTO ENGLISH

If you feel good when she puts her finger on the butt

INTO JAPANESE

彼女が彼女の指をお尻に置いたときにあなたが気分が良い場合

BACK INTO ENGLISH

If you feel good when she puts her finger on the butt