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
A farm owner has been jailed in south Wales after forcing a "vulnerable" labourer to work for free for 13 years while living in squalor.
In the last of the current series of Face to Face, Adrian Masters talks to the journalist and author Nesta Wyn Ellis
A wet and blustery start to the day, but it will brighten up this afternoon!