YOU SAID:

I would like to steal your dads baby sir.

INTO JAPANESE

お父さんの赤ちゃんを盗もうと思います。

BACK INTO ENGLISH

I'm going to steal my dad's baby.

INTO JAPANESE

お父さんの赤ちゃんを盗むつもりです。

BACK INTO ENGLISH

I'm going to steal my dad's baby.