What happened to Roisin Ni She's husband Seamus O Tuama? It doesn't say at ainm.ie, so I had to look elsewhere. Here's what I found.

Irish Press 18 January 1992


Seamus O Tuama, a 75-year-old retired civil servant, died almost immediately after being stabbed with a poker in his home....It is believed that the two men were alone in the house and that the killing followed a loud argument.
The 31-year-old man, who is not being named by gardai, was released from garda custody and is being detained in a Dublin psychiatric hospital.

He was the brother of Sean Og O Tuama, former president of the Gaelic League, who died in 1981.
Shocked friends and colleagues in the Irish revival movement yesterday paid tribute to one of the best-known members of the extraordinary Cork-based family.

President of Conradh na Gaeilge and chairman of Bord na Gaeilge Proinsias MacAonghusa said people would be "very, very shocked. That such a man would be removed in this way will mean an even greater loss than if it were to have been a natural death, "   he said.
"His home in Clonskeagh was a centre of culture and was always run very much as an open house. People involved in the theatre, music, or the Irish language were always welcome to drop in at any hour of the day or night, and did."

Mr. O Tuama was a popular radio and theatre actor for 25 years and was a prominent member of the Craobh an Cheitinnigh branch of the Gaelic League, which specialised in producing plays in Irish for Radio Eireann. At the time when much of the cultural life in Dublin revolved around Parnell Square, with the Gaelic League and the teachers' organisations, Seamus O Tuama was central to it.