I have been to Ireland and maybe can tell you something relevant.
Remember that there are "two" Irelands: Eire (the Island and republic of Ireland) and Northern Ireland that belongs to GB.
The Capital of Eire is Dublin and the other one is Belfast.
Ireland as a whole is beautiful, but you can risk that it rains a week in a row. The most beautiful part is Kelly, Killarney National Park, Galway and many others. Lots of old grey stone ruins of monasteries and churches. Ireland was the first country in the north being converted to the Catholicism. The Irish used to be the most catholic country in Europe along with Spain and Portugal, but lately it seems that the younger generation wants more freedom of thought and movement. The economy has been thriving very well for the last many years and a lot of workers have been imported especially from Poland, but it has been slowing down for the last two or three years.
The currency is EURO, in Northern Ireland I think it is GBP, but if so, probably running along with the Euro as there is no really border between the two. There is going to be a big problem when GB exits the European union at the end of October.
Maybe she will be tempted to not return, but the cool weather, the rain and the lack of animals, apart from cows and sheep, will most likely make her change her idea
The country is very safe. There are some great pubs around where they play Irish music in the evening and the beer is running. The beer is very good and apart from the Guiness which is mass production, there are some really delicious ones both ale, red and dark
In this period it is better to avoid Northern Ireland as there have been signs of unrest due to the above mentioned Brexit.
The sea food is excellent.
Bookworm must do the tour of Killarney. First you are taken through the hills on one of those
and then by boat through another beautiful scenery