Yes, I understand you would do differently now. Young and pregnant and with a young child is a massively vulnerable state and you hadn't had time to figure all out yet.
The important thing is: I doubt anyone could possibly put your actions then in the same category as this girl's. You were scared and trying to protect children: She appears to have had some sinister plan up her sleeve.
I don't know if she should be prosecuted to the extent she is, but something is off.
I think if she hadn't:
a. suggested ways to do it
b. said "get back in" when he texted her his second thoughts, then no one would be so appalled at her. To me, it's those 2 things , in a nutshell.
So crimes are based on your feelings about someone elses thinking (that you cannot prove)?
If saying go ahead basically is a crime, its a crime no matter who does it.