YOU SAID:
my father is pregnant and i'm the sister
INTO JAPANESE
私の父は妊娠していると私は妹です
BACK INTO ENGLISH
My father is pregnant and I am a sister
INTO JAPANESE
私の父は妊娠しており、私は姉です
BACK INTO ENGLISH
My father is pregnant and I am my sister
INTO JAPANESE
私の父は妊娠しており、私は私の妹です
BACK INTO ENGLISH
My father is pregnant and I am my sister
Come on, you can do better than that.