Did you even ask your bank what the wire fee would be before you sent it? I used to figure all banks were the same on this stuff, that a wire was just a wire and you eat the cost. Then my wife sent money to her mom overseas and we got dinged almost two hundred bucks, same deal as you, and it made me actually look at the fine print. Turns out some places charge a flat fee plus a hidden markup on the exchange rate, which is where they really get you. Call your sister's credit union and ask if you can just push money to her account directly, because mine lets me do that now for like five bucks. Lesson learned the hard way, I guess.

Did your cousin even own a thermometer lol?

Seems like a pretty normal thing that you just weren't used to, not some huge cultural clash. People all over the world take shoes off inside and it's mostly about not tracking mud and street junk onto the carpet. Give it a few more visits and you won't even think about it.