Yep, you got it. Your life investment in them isn't protected under the law. But the answer to this dilemma is not legal, it's relational. You see, love would sacrifice financially and not worry about a "return on investment"; love would commit time and energy to their care even knowing that, should the biological parent die, you could be pushed out of the family picture; and love would lift up God's law to a child even though man's law acts like you don't exist. Cause love never fails.