the question still remains though..why would this need to be kept secret? the trip wasn't secret..why was the visit to be?
also,we do not know who told her this,and perhaps the person she said it to does.that has not been revealed.
IF it were someone close to the family,like JAR or JR who told her that..then that adds a certain signifigance to the 'secret' meeting,imo.
I beleive that statement was paraphrased,and that JB was actually describing an incident of a sexual nature,or perhaps Patsy's corporal cleaning.Thomas went out of his way to bring it up in his book,which makes me think it holds a certain signifigance to the crime.This is why he could not reveal her actual words.I think that was the message he was trying to convey in his book.
This is all JMO of course.