Evidence at the trial showed that Davina - whose body was found kneeling on the floor - had put up a struggle.
After killing the girls, Kumari-Baker, a hotel worker, rang a friend to say: 'I have done something terrible.'
In a hand-written note she left at the murder scene, she wrote: 'I don't want them to get hurt as I did.'
She concluded the note by writing: 'My kids will not be a burden to anyone anymore.'
The father of Davina and Jasmine - sisters who were devoted to each other - spoke Tuesday of his 'incalculable' loss.
Earlier, in a statement read out by his brother Monday, David Baker said of Kumari-Baker: 'I take comfort in the knowledge that I will in time be with my girls again. She will not.'
'Not a day passes when I don't think of my girls. Part of my heart was taken when they died and I long for the day when we shall be reunited.'