YOU SAID:

I was partying with my little brothers cat

INTO JAPANESE

私は少しの兄弟猫とパーティーだった

BACK INTO ENGLISH

I was having a party with a few siblings

INTO JAPANESE

少数の兄弟とパーティーを抱えていた

BACK INTO ENGLISH

Were having a party with a few brothers

INTO JAPANESE

いくつかの兄弟とパーティーを楽しんでいた

BACK INTO ENGLISH

Enjoyed the party with some brothers

INTO JAPANESE

いくつかの兄弟でパーティを楽しんだ

BACK INTO ENGLISH

I enjoyed the party with some brothers.

INTO JAPANESE

私は昨日パーティーで楽しく過ごした。

BACK INTO ENGLISH

I enjoyed myself at the party yesterday.

INTO JAPANESE

私は昨日パーティーで楽しく過ごした。

BACK INTO ENGLISH

I enjoyed myself at the party yesterday.