For those worried about the parents being off the chicks, no its getting closer to the 10 day point so they are getting close to being able to thermoregulate, so as long as it isn't too sunny, too cool, wet or windy, the chicks are fine for periods of time. As to where Princess and/or Ivy are, looking with the spycam, they are often sitting on the ledge edge ...
... and Princess may know that rain may come and is taking advantage of the neutral weather before she has to go to work, by this point the chicks are probably too large to fit "waterproofed" under Ivy so Princess will be the umbrella today I suspect ...