RedactedNarrative: We contacted the operator of the 19' Wellcraft vessel. The operator was accompanied by his wife, son, and daughter. The operator told us that they were travelling east in Lake Mead's boulder basin when another vessel further ahead passed in front of them causing a wake. Operator down throttled his vessel to ease the impact from the wake. The impact from the wake caused the daughter to bounce out of her seat and prompt the wife to attempt to catch her. Wife hit her left knee on the bottom of windshield pass through on the vessel. Her left knee was swollen and red around the knee cap. She also stated that she hit the back of her head during the fall. There was no damage to the vessel resulting from the incident.