The family of Kim Buckley, Kayleigh and 6-month-old Kimberley said they felt 'justice was served' as Carl Mills was jailed for 30 years.
A statement, issued on behalf of the family by Gwent police, added:
"Carl Mills starts a life sentence for three murders but for us, the family and friends of Kim, Kayleigh and Kimberley, our life sentence started on 18 September last year when three beautiful innocent people were torn from our lives."
More top news
A man has claimed he robbed a bank to fund cancer treatment for his young daughter who suffers from a rare from of eye cancer.
Presenter Sue Perkins took the Culture Secretary to task over BBC cuts after ambushing him as he ate his dinner.
War veteran Paul Royle died at a Perth hospital on Sunday following surgery on a hip fracture.