Hi everyoneI am always impressed with the depth of knowledge

Hi everyone

I am always impressed with the depth of knowledge the community has and wonder if anyone can answer this conundrum. 

I am an Irish Citizen , unfortunately my British wife of 48 years never applied for Irish Citizenship before 2012 when it would have been granted automatically. We have holiday apartment in Italy and understand post Brexit, non EU citizens can only stay for 90 days in any 180 days . I am exempt from this rule but will I have to just observe the time limitations, send my wife home and stay alone , or is she exempted from the rule as married to and living with an EU Citizen . 
Thanks in anticipation. Mike