My family takes a one week trip every year for some water skiing. It's a great chance for us to spend time together and for me to practice my sportraits.
I don't know what you are complaining about. Your wife's focusing skills are consistent with the photos you posted last summer.
That fenceline and the trees are PERFECTLY in focus. It would be an iconic image if it weren't for that OOF blob in the foreground. Oh well, there's always the clone tool.