Yvonne Freaney has been found guilty of manslaughter after killing her severely autistic son – but cleared of murder.
She had already admitted strangling 11-year-old Glen with a belt at the Sky Plaza Hotel near Cardiff Airport last May and pleaded guilty to manslaughter through diminished responsibility.
The mother-of-four said she killed him because no one else would look after him and he had been let down by social services.
It was up to a jury to decide whether Freaney, 49, was telling the truth, or whether she was guilty of murder.
After a day of deliberation at Cardiff Crown Court, a jury of seven men and five women cleared her of the single charge of murder.
The court had previously heard details of how Glen’s medical condition meant he required 24-hour care and was totally dependent on his mother.
They were also told of Freaney’s “loving and devoted” relationship with her son.
Freaney attempted to take her own life shortly after strangling Glen, the jury heard.
She later told officers: “I strangled him. He’s in heaven now where he won’t be autistic, he’ll be happy now.”
The court heard further details of Freaney’s own background, which included domestic abuse.
Her husband Mark Freaney admitted that the couple had a violent relationship and often came to blows.
The court heard Freaney was facing a lifetime of one-to-one care for her disabled son after her troubled marriage broke down and she moved out of her Penarth home.
Mr Justice Wyn Williams said Freaney would be sentenced on 10 June at Cardiff Crown Court.