I agree that the real question is who are these children, the one MM refers to the 8 years old step daughter and the 6 year old foster boy refereed to by the Lynch. But MM posts did not change, she never changed the age of the child she referred to in her posts. MM posts are identical now to what they were a couple of months back which is confirmed within the previous thread, one is even copied in this previous thread. Articles might change but these posts by MM did not. IMO it is unfair to make out that she personally changed the ages of the child she was posting about, thus adding another twist, when in fact she did not.
https://answers.yahoo.com/activity/answers?show=2JJVCB5LGGTW3X67DEWXWS5C4A&t=g
No idea about the six year old foster boy, it might be a fantasy of MM, but reference to this has only come from the Lynch family, I do however suspect that the 8 year old girl that she refers to as a "step daughter" does exist. At the time when she posted it, she would have been 21/22 and she claims to being a primary school teacher.