YOU SAID:

bro guess what my sister is pregnet i am going to be a dad

INTO JAPANESE

お姉ちゃんが妊娠していると思う私はパパになるつもりだ

BACK INTO ENGLISH

I think your sister's pregnant. I'm gonna be your dad.

INTO JAPANESE

お姉ちゃんは妊娠してるお父さんになるわ

BACK INTO ENGLISH

Your sister's gonna be a pregnant dad.

INTO JAPANESE

お姉ちゃんは妊娠中のパパになるわ

BACK INTO ENGLISH

Your sister's gonna be a pregnant dad.