Pauline Morse also said Friday under cross-examination by attorneys for 60-year-old Melvin Morse that the alleged waterboarding usually lasted less than a minute.
She also reiterated that she witnessed only one such incident.
Melvin Morse, a former pediatrician, is accused of endangerment and assault and could get more than 20 years in prison if convicted.
As she did a day earlier, Pauline Morse was forced to admit several contradictions in her testimony and in statements she's given to authorities.
Melvin Morse, who has researched near-death experiences involving children, denies police claims that he may have been experimenting on the girl.