My money is on Marshall. I think that Anna and Stern plotted to get his money and when Marshall's son died this just sealed the deal. I can see her being so emotionally invested in getting the money that she would do something like that to insure it. The sad thing is that this child is probably just a by product of her and HKS's greed. I did like HKS when I watched the ANS show.. yes, I admit it. To me it was like a bug zapper to a bug... I just couldn't look away when it was on. I actually felt sorry for him at times...