In my immediate family (Me, my husband, and two kids) finances are not taboo and we are open about money with each other, though we try not to be too nosy or intrusive. With our extended family (grandparents, aunts, uncles, cousins) it’s not taboo, but it’s not expected to share every minute detail of your finances and you certainly aren’t expected to share if you don’t want. That said, we talk about other stuff mostly and our relatives aren’t nosy…
I don’t really talk about finances with friends or co workers…then again no one has really asked…