she is still quite far from coming out of that marriage
Of course, that's a very good point as she's not actually divorced.
For all we know, there might well never have been a fraudulent and/or bigamous marriage at all.
That's true. She could simply have made a bad choice of husband and regretted it. I would say she probably didn't know the divorce law in Ireland when she married and it came as a huge shock to discover that it's not like Poland where you can be rid of your spouse in a few months. Five year waiting time in Ireland. Hence she'll have to go down the null and void route if she doesn't want to wait.
However if she does that and gets a decree of anullment on the basis of being defrauded into a marriage for residence purposes, the Gardai will then get involved as the ex-husband will be investigated with a view to prosecution. So she'd need to be careful. She's already made a big enough mess of her life.
One of the problems is that people today seem to be finding it increasingly hard to understand and accept that actions have consequences and that there isn't always a quick fix solution, especially for a major error of judgement.