RedactedNarrative: ON JULY 4, 2021 AT APPROXIMATELY 11:30AM V1 OPERATOR AND V2 OPERATOR WERE OPERATING THEIR PERSONAL WATERCRAFTS (PWC) ON MOON LAKE IN ST. GERMAIN, VILAS COUNTY, WI. V1 OPERATOR WAS DRIFTING (PWC IN NEUTRAL) WHEN HER SISTER, V2 OPERATOR, ATTEMPTED TO SPLASH HER WITH THE WAKE/WATER FROM HER PWC. V2 OPERATOR WAS OPERATING HER PWC AT APPROXIMATELY 20-25MPH AND ATTEMPTED TO MAKE A SHARP LEFT TURN IN ORDER TO SPLASH V1 OPERATOR. V2 OPERATOR STRUCK V1 OPERATOR'S PWC ON THE REAR STARBOARD SIDE, CAUSING V1 OPERATOR TO BE EJECTED FROM HER PWC. V1 OPERATOR RECEIVED MEDICAL TREATMENT FOR A LACERATION TO HER KNEE AND A FRACTURED PATELLA.