YOU SAID:

We are going to a party in the house of my friends boss

INTO JAPANESE

友達の上司の家でパーティーに行きます

BACK INTO ENGLISH

I go to a party at my friend's boss's house

INTO JAPANESE

友達の上司の家でパーティーに行く

BACK INTO ENGLISH

Go to a party at a friend's boss's house

INTO JAPANESE

友達の上司の家でパーティーに行く

BACK INTO ENGLISH

Go to a party at a friend's boss's house