\\\\They ignore any messages I send to them and refuse to let me see my grandchild. \\\\
That wouldn't bother me one jott, but when they become grandmothers,most women throw reason out of the house and take on the task of a doting grandmother............can't understand it.
However, in your situation, I would sit back and see what transpires....difficult for you, i do appreciate, however in the case of a 20yr old and a 19yr old who know all there is to know about parenting, poking your nose in will just inflame the situation further.