Divorce only became legal in Ireland in 1997!! Of course that doesn't mean marriages didn't break up before then, often one partner moved to another country and got the divorce there, but it sure left a mess in Ireland when it came to dividing estates between the "legal" first family and any subsequent partners and children.
Our last Taoiseach was legally separated from his wife and had his live-in partner accompanying him to official functions which caused a bit of controversy as well.
I joke about divorce regularly, but we've had some awful years so honestly if I haven't left by now then I'm not likely to.