This is a very sad case, and unfortunately Lisa Miller undermined everything she fought for when she accepted child support from Janet Jenkins.
If you accept the idea that your partner has a parental responsibility, you accept that your partner has potential parental rights. It would have been easy as pie to argue that because Janet had never legally adopted the baby even after Lisa asked her to, she had voided her parental rights and responsibilities, but accepting the child support money completely undid that argument and is enough to convince me that Lisa Miller is being at least a little bit selfish and unreliable. Actions have consequences and unfortunately they’re all hitting a little girl harder than the women who knowingly dragged her into this mess.
I believe that the term is “psychological parent.” I’m guessing that there is also a Hague element although I don’t know whether Nicaragua is a signer of the Hague Convention on International Kidnapping.