Regarding the birth stories - I don't have a link but I read somewhere that families from the school community/ neighborhood were surprised to learn after Jason's death that Molly was not the children's biological mother. But nobody was directly quoted as saying it. So I think this "nugget" came from a journalist who was looking for background info and got that without anyone being willing to go on record. Does this make it true that Molly intentionally wanted people to believe Jack and Sarah were her biological children? This sounds like a question that could be put on hold until/ if either the prosecution or defense wants to call up neighbors/ friends to testify in court. The lawyers might decide it's not relevant, OR either the prosecution or defense could find a friend/ neighbor with a story that bolsters their case.
With my close friends, I am confident I know for a fact whether their children are biological/ adopted/ stepchildren. With people I say hello to at the school gate or soccer practice, I don't necessarily know and it's not really relevant to me, so if a journalist asked me, I wouldn't be prepared to answer. However, if I'd been socializing with a friend for several years, confiding in each other about various things, in and out of each other's houses, and our kids playing together, it would be strange and disturbing to find out that the children came from a previous marriage that had never been mentioned.
Her lawyer also said this about what the neighbours thought about her being the natural mother. I also read it in another articles that many neighbours were shocked when they found out she was not, can't remember which one but think it was one of the American papers.
Her lawyer Mr Freedman said
“The children were living a good life, I saw a number of Mother’s Day cards, drawings of the family. All the neighbours believed Molly was their natural mother.”
http://www.limerickleader.ie/news/community/129601/US-wife-of-slain-Limerickman-misses.html
Also, there was an interview on Newstalk with the DM reporter and within the interview she mentions the six in the house when the event took place but when she is talking about the social event at the house that evening, it would seem to me that this is only referring to JC, MM & the neighbours. It also refers to no domestic disturbance records previously, no police records or hospital records.
http://www.newstalk.com/Limerick-mans-wife-and-fatherinlaw-charged-with-his-murder