Marina Park in Kirkland WA

Hi, I'm a nanny and recently observed another nanny while out with my kids that totally shocked me! I was at Marina Park in Kirkland WA when I saw this. There were 3 children who looked to be about 4 years, 6 years and 7 years. I couldn't figure out who they belonged to, I was there for 20 minutes and never saw them interact with an adult and there wasn't anybody nearby. They were playing somewhat dangerously near the edge of the rocks that lead down to the water. And of course behind them was the road.

I was about to go up and ask them where their parents were when they ran off to a young woman laying in the grass about 60 feet away from where they were playing. I'd seen the woman laying there but never imagined they were connected as the woman was laying in the grass facing away from the children and playing on her phone. I never once saw her turn around to look at the kids and she was quite far away from them. In 20 minutes she never interracted with them, checked on them, or even looked at them so far as I could see. As a nanny this surprised and even angered me a bit, I couldn't believe her! The nanny was young, maybe about 23 years old, with dark brown hair. She was wearing a tank top and shorts. I believe the kids were all blonde but I can't quite remember.