By the same token we should not be tripping over ourselves to castigate this case. I agree with your point but don't think it is necessary to single it out for special attention.
It is not loving to be an enabler. At the same time, I do not know all the details of this family and am not qualified to make sweeping judgments on what Lynn should or should not be saying and doing about her daughter. Going by appearances only, it seems that she is loving her daughter to death. I understand that urge, but it is not godly love. It's human love -- the weak and confused kind. It won't stand up before God on that day when He judges us all.