This thread is already too long but can I say in regards of pointing out that African/Latin American women BF to 7/8, this is because the poor buggers are starving and quite often BM is all the child is going to get that day, even if it does weaken the mother.... so really that should have no bearing on the English 8 year old's argument, although obviously I'm sure that some African/Latin American women enjoy it too, but it's a secondary reason, if you look at breastfeeding length you'll find it corrolates pretty well with how poor a country the people are from...
I really do wonder (as a few have said) what the psychological benefits/damage of breastfeeding such an old child are... still reserving judgement but feel a bit as if the mother might be placing herself somewhere where she can be suprememely important to her child in a very unhealthy way, especially with the home-schooling, which could have long term effects on that child's mental health.. I would love to see an unbiased psychological profile of that family, and I'd love to see the child in 10 years time...
Breastfeeding to 4 doesn't bother me though... it's around then that I would think a natural mutual ending point would occur (2-4 sounds very sensible)