I'm a nanny for more than 10 years now. I took all my charges to swimming at community pools. And the recent family has pool. I have spotless references from every single families I ever worked. NOBODY ever required me to stay in the pool all the time with the kids if they were very good swimmers and they were older. I always talked to them what they wanted from me at the pool. But nobody had insane request staying in the water for hours. Most of the time the kids were happily playing with their friends in the water. I always KEEP eyes on them from the side if I'm not in the water. Of course I stayed with younger ones and not swimmer ones in the water. Right now where I work the kids all day long if we are home, jump in the pool for 2 minutes just to cool down... Then they are out.. 1 hour later they repeat it...They just strip their cloths off and they jump in their underwear... And one of the kids is not even 6. And the parents are perfectly OK for me not doing that "craziness"...

And when their friends are coming over for swimming I constantly keeping eyes on them from the side..... BUT the kids want to play with their friends and not with me..... Just think about it seriously... DO we wanted our parents or some adults always telling us how to play with our friends or our siblings?