I know this is horrible thing to say but it is possible she wants attentions or somebody with her. probably feel like everyone is leaving her and she is not able to process that properly. trying to suicide and not being able to do it 5 times is, well, not really a suicide at that point.
Well, behaviorally it may look that way (and probably does), but there is an alternative way to conceptualize it that is less pejorative and probably a more accurate way to understand what is going on. She probably has a biological or temperamental inability to regulate emotions well (emotion regulation being how well you can handle the natural course of aversive emotional states, and what strategies you employ to do so). Maybe she also grew up in a neglectful or abusive family, and only got the appropriate care she needed when something extreme happened (e.g. injury). You then have a developmental recipe in which a person experiences an extreme on the spectrum of emotions, has difficulty modulating those emotional experiences on her own, and caregivers that rarely help with those difficulties except under extreme circumstances. Getting into trouble, self harm, etc may have been the go-to ways to get attention and needs met throughout life, at the expense of developing other strategies for regulating emotions. Neglectful parents are not around to teach healthy regulatory strategies either explicitly or through modeling, and behaviors that are harmful in the long term (self harm, getting into trouble, etc) may continue to be reinforced because (1)they ARE effective at modulating emotional reactions in the immediate term, and (2)they are the only strategy known. Once that pattern is set for years or decades, it is extremely difficult to change course.
Emotion dysregulation is a fundamental component to self-harm, suicidality, borderline personality, and substance use, among others. Until recently, many of those conditions were either marginally treatable or basically untreatable. In the past 20 years, strict behavioral interventions (notably DBT - dialectical behavioral therapy) have been developed that are quite effective at treating emotion dysregulation as well as the specific manifestation of that (substance use, self harm, etc --though many many are comorbid).
I'm obviously no longer talking about Noodleface's mom specifically, as I've gone off into speculation land. But the scenario I described is quite, quite common in people who are typically seen as "looking for attention." The reality is usually a lot more complex, less pejorative, and the "attention-seeking" behaviors are generally learned patterns of behaviors that serve a genuine purpose in the short term of alleviating distress, and are not done in the conscious, manipulative way that "seeking attention" tends to suggest. However, it is understandably frustrating and "looking for attention" is a fair response of someone who has had the frustration of dealing with a person like that for years and years.
In terms of specifics for Noodleface, the first thing I'd do is research the rehab facility (by calling or maybe if the info is available on their website) and inquiring about the empirical support of their treatment method. Psychology is rampant with treatments that have little to no empirical support (by rampant I mean probably in the range of 80% or higher), so that's the first thing I'd do when seeking ANY psychological treatment.
First question you should always ask a potential therapist or treatment center: "What is your position on empirically supported treatments?" Run if they give you some runaround answer. Following assessment and presentation of a treatment plan (if these don't exist, run), your 2nd essential question is "What is the empirical support of your suggested treatment?" Unfortunately, those who don't believe that clinical psychology can, should be, and is a science, will give the response that the therapeutic relationship accounts for a vast majority of the change (wrong) and that empirically supported treatments are restrictive and "cookbook recipes" of therapy (wrong), and you'll tend to trust their PhD over some dude on the internet.
