In this scene, the painter is talking to the nurse and explain to him how actually the world they live in is bad and that he will die his own way when he wants to. Also, the nurse gives the painter the number of the termination bureau, 2BRO2B.
This scene is where the terminator woman, Leora Duncan comes in for her portrait to get done, Leora is asked where she wants her portrait to be and she says next to the doctor, after saying no to her first option. Then the painter continues to paint her on a body that is sawing off a limb of someone else.
At this part, the doctor, Dr. Hitz, comes in and tells the father in waiting that his triplets have been born. And ask him if he has found three people to die for the children. The father says no.
Now, the father-to-be was talking to Dr.Hitz about how he didn't have enough people to die to keep the children. Also, how he isn't happy with how their society works.
This is the part where the father-to-be pulls out a gun and shoots everyone, except the painter. Making room for all three of his children. Noone heard the shots or saw the scene except the painter.
Now, the painter almost killed himself with the gun but then he decided to do the world a "favor" and call the Termantion Bureau.