Aww geez. It would've been better if her husband was actually dead, it seems.
Yeah, I don't think this is her putting her faith in the Spearados's word so much as sheer desperation. When you're a commoner, stuck with an abusive husband, and your baby is sick, it's pretty much take a chance to fix everything or die without resisting. Happy Mother's Day, Amroa.
And the same could be said for Leslie. She'll fight to live, because the alternative is just obediently dying and fuuuuuuck that.