I think Cassie should go with what's best for her biological son, which is probably not trying to sue his adoptive mother, even if you have a valid point.Also, as dicussed in the other thread, apparently (allegedley), she's called the adoptive mother while drunk. If this behavior is true than I don't blame the adoptive-mother for lieing to her son about Cassie.
Please join the other discussion, there are a lot of good points made in the other thread. (Noty trying to moderate, just trying to point you in the direction of a more productive discussion.)