She slept with a guy she'd known for no more than 6 months, got pregnant, the guy is 100% out at this point, she's set on having it without asking for any sort of support system, she basically feels like he's out and it's all up to her, and since he opted out, she feels she has no right to make him pay for anything.

She is an idiot. Totally naive to what she's gotten herself into. How can I convince her of this before it's too late?