The schoolboy had suffered multiple injuries to his body and died in July 2010 from internal injuries caused by three months of punishing beatings.
Ege set fire to the family house to hide her actions and played the part of a parent mourning the tragic death of her son until it was discovered in a post-mortem that Yaseen had been dead before the blaze started.
Mr Justice Wyn Williams ordered her to serve a minimum of 17 years behind bars and said: "The violence that you perpetrated on your son was not confined to one day.
"I am satisfied that, over three months, you beat him on a number of occasions, often with a wooden pestle.
"His injuries must have caused him a good deal of pain. In my judgment Yaseen was subjected to prolonged cruelty."
The judge accepted the defence's argument that India-born Ege was "a devoted and loving mother" who suffered from depression and domestic violence.
Ege accused her husband Yousef Ege, 38, who stood trial with his wife, of being a violent bully who beat her and was their son's real killer.
But he was cleared of causing or allowing his son's death at home in Pontcanna, Cardiff, South Wales, by failing to act to prevent it.
Whether dad was an abuser or not, how was he cleared of any responsibility? For 3 months mum mercilessly beats her son and dad doesn't do anything to stop the abuse? That's unforgivable.