married aunts and uncles
I realized something today... my father's sister is my farster, and my father's brother is my farbror - but what about my father's brother's wife? I call her aunt - but she's not my father's sister. Do you still say farster, or do you have a special word?
Yes, it's normal to call your father's brother's wife "faster". And "farbror" is even more general, since that can be "any old man". Before, when children did not use "du" to address friends of their parents, it was common to say for example "tant Ulla" och "farbror Sven".