YOU SAID:

I saw my daughter's friend at the slumber party

INTO JAPANESE

パジャマパーティーで娘の友達に会いました

BACK INTO ENGLISH

I met my daughter's friend at a pajama party

INTO JAPANESE

私は娘のパジャマパーティーで友達に会いました

BACK INTO ENGLISH

I met my friend at my daughter's pajama party

INTO JAPANESE

娘のパジャマパーティーで友達に会った

BACK INTO ENGLISH

I met my friend at my daughter's pajama party