YOU SAID:

I really want a dog but do not tell my mother because she wants a cat. But I really need a dog and my mother does not need a cat.

INTO JAPANESE

私は本当に犬が欲しいのですが、彼女は猫が欲しいので母に言いません。しかし、私は本当に犬が必要で、母は猫を必要としません。

BACK INTO ENGLISH

I really want a dog, but she does not tell my mother because she wants a cat. But I really need a dog and my mother does not need a cat.

INTO JAPANESE

私は本当に犬が欲しいのですが、彼女は猫が欲しいので私の母親には話しません。しかし、私は本当に犬が必要で、母は猫を必要としません。

BACK INTO ENGLISH

I really want a dog, but she does not tell my mother because she wants a cat. But I really need a dog and my mother does not need a cat.