Comfort or Comforting is an action performed by pressing the appropriate button when available.
A 
Baby that is hiding in a 
Hiding Spot is scared and won't come out.
The baby must be comforted before it will come out of the Hiding Spot to be picked up.
Mechanics[ | ]
You have to be close enough to a Hiding Spot with a baby hiding inside for the Comfort prompt to appear.
Press the appropriate button when available and the baby will be comforted.
There is an onscreen indicator of the success of Comforting and it takes several successful attempts before the baby will come out of the Hiding Spot.