YOU SAID:

I'll come to your house and back fairy cakes with you.

INTO JAPANESE

私はあなたの家に来て、あなたと妖精のケーキを連れてきます。

BACK INTO ENGLISH

I will come to your house and bring you a fairy cake.

INTO JAPANESE

私はあなたの家に来て、あなたに妖精のケーキを持って来ます。

BACK INTO ENGLISH

I will come to your house and bring you a fairy cake.