YOU SAID:

In 9 months I am going to have a sister.

INTO JAPANESE

9ヶ月で私は妹を持つつもりです。

BACK INTO ENGLISH

I will have a sister in nine months.

INTO JAPANESE

私は9ヶ月で妹を抱えています。

BACK INTO ENGLISH

I have my sister in nine months.

INTO JAPANESE

9 ヶ月で私の妹があります。

BACK INTO ENGLISH

9 months with my sister.

INTO JAPANESE

私の姉と 9 ヶ月。

BACK INTO ENGLISH

My sister and nine months.

INTO JAPANESE

妹と 9 ヶ月。

BACK INTO ENGLISH

His sister and nine months.

INTO JAPANESE

彼の妹と 9 ヶ月。

BACK INTO ENGLISH

His sister and nine months.