Sounds like you know exactly what's going on here. Amanda doesn't realize these people and their boy will dump her in a heartbeat afterwards. Thta's what she needs to see now. She needs to be told to look at that guy, she thinks loves and see what he is telling her to do. He is empty, just an irresponsible lout.
Maybe this girl can be convinced to try something: Tell the boy and his family that she aborted the child, and have a "family emergency" come up that requires her to move out of state for a period of time. She can have the child and give it up for adoption.
After she returns and the kid (under pressure from his parents) dumps her anyway, she'll understand the magnitude of depravity that she was dealing with -- the parents pressured their son to get her to abort the child, then had him dump her anyway.
Oh, and when it is all over and she announces that she actually had the child, THEY can understand the magnitude of moral, upright behavior THEY were dealing with.