The first thing Alex did was to restore his old body wiping out any compulsion to obey his mother (or go on a killing spree) that he wouldn't naturally have. Next he grouped everyone excluding himself into either guest or staff. All the guests including his mother had a strong urge to go somewhere safe and lie down. Once they were laying, they immediately fell asleep unable to be woken. His mother who was already on a lounge chair immediately fell asleep. Those in the pool got out and some slept at the edge, others got to a chair or lounger, one slept on an inflatable raft.
Next, Alex sent a compulsion to the staff to ensure everything and everyone is safe and then retire to your quarters for the day.
Alex didn't yet know who the chef or poolboys were, though he was pretty sure one was one of the guests 9 year old boy, the unfortunate older brother to the little girl in the next room. "Simms" had welcomed them in hours ago and only just realized he hadnt been seen since he escorted the family to the pool. One of Mistress' friends misunderstood the term pool party.
With nothing expected to catch fire in the kitchen or laundry, and no guests expected to drown, Alex set to work.
His mother screwed up a good many things but he now could make them right... he...