No one saying that its right to cheat.
But if you remember, Sineads advice about being cheating on was basically telling the person that they have to look at themselves to see why they were cheated on.
This is the BS advice she is giving others. If she's telling others to look at themselves, then she needs to her own bullshit advice and look at herself.
You don't need to be an expert (or claim to be an expert like sinead) to know that it's not your fault if you get cheated on. It's the cheating partner that needs to look at themselves.
It's not sineads fault, it's Jack's. We 100% agree.