YOU SAID:

I want to pet her for a long time.

INTO JAPANESE

私は長い時間のために彼女をペットにしたいです。

BACK INTO ENGLISH

I want to make her pet for a long time.

INTO JAPANESE

私は長い時間のために彼女のペットを作りたいです。

BACK INTO ENGLISH

I want to make her pet for a long time.