YOU SAID:
i needed to poo, but my sister wouldn't let me in.
INTO JAPANESE
私はプッシュする必要があったが、私の妹は私を入れさせなかった。
BACK INTO ENGLISH
I needed to push, but my sister did not let me in.
INTO JAPANESE
私はプッシュする必要があったが、私の妹は私を入れさせなかった。
BACK INTO ENGLISH
I needed to push, but my sister did not let me in.
That didn't even make that much sense in English.