The murder took place in front of the two children aged 1 and 6 years old.
The latter were hospitalized following the tragedy which took place Sunday evening in Guyancourt (Yvelines).
A 34-year-old man died at his family home from a stab wound to the chest.
An investigation into intentional homicide by a spouse was opened by the Versailles public prosecutor's office, Le Parisien learned this Monday.
According to initial information, the fatal altercation could have originated in a couple's dispute.
He would have grabbed his partner by the neck
The partner allegedly blamed the victim for returning late from an evening at his sister's house; the man, angry, grabbed his partner by the neck before she dealt the fatal blow with the kitchen knife she had used. 'she held in her hand.
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No history of violence was recorded within this couple.
The suspect, aged 36, was hospitalized and was therefore not able to be interviewed by investigators this Monday evening.