Being in the military, I don't know how many times I heard a family member or friend say this statement before a person has taken their own life, "I don't think that she (or he) would do it.". I wouldn't diminish the seriousness of the situations because of how you feel.
You don't know how deep a person think they have gotten themselves in their own head.
I wouldn't of told a person that think they are telling you they are thinking about hurting themselves, you are obligated to take their kids. I would fall back on discussing her relationship or ya'll relationship for a while. Just my opinion.
Joe
M:37 W:37 T:11 M:10 S17, S13, S10, S4 BD:06/28/17 OM confirmed 07/20/17 Recon the M 10/29/17 Working hard:2gether
Onward and forward
This process is not a sprint it's a marathon! Patience, Patience, Patience.