We all hope so too, Friend. I'm guessing that it has done no good to point out to her that, by killing herself, she would be leaving her small child in a worse situation (motherless) than if she were an absentee parent, sharing custody or visiting.

As to the "stigma": you and, now, her father know that she is contemplating suicide. If she carries it out, that's a secret with which you will both be burdened. Who knows whether the father would be willing to keep that secret? Either way (secret kept or revealed), it damages other people besides the one who commits the suicide.