Definitely! I would make a joke about it and they will probably say that it was a typo error by the calligrapher, which I’m sure it was. If you don’t say anything and you think it was done on purpose then it’ll probably fester and become a larger issue and rift in the family.
If you just separated it’s possible that his family assumed
you wouldn’t go to the wedding, and in that case it’s your soon to be
ex-husband’s call.
