Jimmy and Cathy Holdsworth were moved from the intensive care unit at Moore Regional Hospital Tuesday. The children, ages 12 and 15, remain hospitalized.
Their sister, Constance Holdsworth, 16, was released from the hospital Monday.
Justin Michael Martin, 22, of Foxfire, faces three counts of attempted murder and three counts of assault with a deadly weapon inflicting serious injury with intent to kill.
Police were called to the Holdsworth family's home around 2 a.m. Saturday.
Moore County sheriff's officials said each of the siblings had their throats cut.
Officials said evidence at the scene indicated one of the children woke up during the attack and attempted to resist, causing the attacker to flee.
Authorities said Martin worked with the children's father atSeven Lakes Heating and Air and was spending the night with the family. Police said Martin had been drinking heavily that night.
Martin is being held under $1 million bond. His firstcourt appearance is scheduled for Sept. 19.