What would you do as supervisor in that situation?

Tell the CNA to leave the room and take care of the client yourself.

Tell the CNA to leave the room, take care of the client yourself, call the owner of the home, and state you will be calling Adult Protective Services.

Go into the living room, check on the other residents and take the next day to think about what you should do.

Ask the CNA what she is doing, let her know you understand and help take care of the client.