YOU SAID:

I had a party and my mom found out

INTO JAPANESE

私はパーティーを持っていたし、私のお母さんが知った

BACK INTO ENGLISH

I had a party and my mom knew

INTO JAPANESE

私はパーティーを持っていたし、私のお母さんは知っていた

BACK INTO ENGLISH

I had a party and my mom knew