Poor babies were scared. They wanted reassurance.
It sounded like the mom was calling out for help as Carly sang.
I thought I heard the same... mom making moaning sound and Carly sang. Then Carly stops texting, gets up from the kitchen stool and goes back towards her bedroom/bathroom area... and it made me wonder if Carly went back in the room and covered mom's face with a towel.
That part of the video was distressing... for me.