2) if she inform there is any chance to cancel the visa?
No I dont think so, as they are married for 3 years and she already had VISA upto 2012.
They have to go for 4 year separation by Law(solicitors).
http://www.inis.gov.ie/en/INIS/Pages/EU ... y%20Rights
Other features of the Regulations
The new status of permanent residence for EU citizens and their family members after five years uninterrupted legal residence in the State is lost only in the event of more than two successive years’ absence from Ireland or in circumstances where removal procedures have been commenced against the person concerned.
The death of the EU citizen, his/her departure from Ireland, divorce, annulment of marriage or termination of partnership will not affect the right of family members who are not nationals of a Member State to continue residing in Ireland, subject to certain conditions.
Under the Directive, Member States have the power to expel persons from their territory. EU citizens or their family members may be expelled on grounds of public policy, public security or public health. However, before making such a decision the host Member State must assess a number of factors such as how long the individual concerned has resided on its territory, his/her age, state of health, family and economic situation, social and cultural integration into the host Member State and the extent of his/her links with the country of origin.