"My boss works at night."
Translation:הבוסית שלי עובדת בלילה.
it is much more common about family relatives (אחי - my brother, btw it's also a slang like "bro", אחותי - my sister, סבתי - my grandma, but usually people use the word סבתי only if the grandma past away because it's much more natural saying סבתי עליה השלום or סבתי זכרונה לברכה (my grandma RIP) than saying it with סבתא שלי), the same goes for אמי, אבי, סבי (my mom, my dad, my grandpa). sometimes you can hear parents say בני or בתי (my son, my daughter). it is rarely used to describe relatives of other people apart from אחותה (her sister) or אחותך (your sister). it is also common when talking about several books ספרי (my books), ספריך (your books). also we have a term like "youth", and when talking especially on 3rd person, but also on 2nd person youth you'll use possessive suffix - בנעוריה, בנעוריהן, בנעריו etc the same goes for בילדותו, בילדותה (when he was a child, when she was a child) etc. that what pops right away, probably there are a few more possessive suffix commonly used