This idea of offspring learning the songs of their parent traditional singers from tapes has occurred before. Roger Hinchliffe had little interest in his dad's songs until Frank passed on. Ian Russell then persuaded him to take on his dad's repertoire, and he now performs this repertoire at song gatherings etc. Personally I can't see anything but positives in this. There is certainly no deception so we are out of the realms of 'fakesong' here, obviously. There are 2 points perhaps to make which I don't think will be controversial. Future researchers will be able to come along and compare the versions sung by the parents and their offspring, and anyone wishing to go direct to the source can easily do so. Of course to anyone just interested in singing this is all irrelevant.