PAPA
You would write brother as bro. But many people think this is a 'slang' word, but it is not, it is an actual short form from brother. Bro is one of the most common ways of saying brother in short form.
Sis
The plural possessive form is fathers-in-law's.
For HM Da Q, I always call her "Your Maj'"
The plural form of the noun father is fathers.The plural possessive form is fathers'.Example: How many fathers' names are on the list of volunteers?
The plural form for the noun father is fathers.The plural possessive form is fathers'.Example: We met because our fathers' houses are next door to each other.
The possessive form of the plural noun fathers is: the fathers' rights.
Pakistanis are called as Pakis,it is a short form for Pakistanis.
The possessive form for the noun brother is brother's.Example: My brother's daughter is my niece.
The singular possessive form for brother is brother's; for example:I drive my brother's car.
Means a short form for xoxo. Or one could take as form of endearment in signing off
The possessive form of the noun brother is brother's.The possessive form of the coat of my brother is my brother's coat.