Melanie Smith will be sentenced on 8 May for murdering five members of the same family in a flat fire in Prestatyn.
Mr Justice Griffith-Williams warned the 43-year-old that she should expect a life sentence.
More top news
Wales are through to the Rugby World Cup quarter-finals after Australia beat England at Twickenham last night.
The Conservative's annual conference is getting underway in Manchester, and talk has turned to next year's Welsh election.
A band of showery rain will push through overnight, but it will feel mild.