Financial "security" isn't the end all to be all, especially when raising a family, no matter the size. It's just sad to see the demise of their family.
No doubt the stresses of such births and timing are something we can't personally relate to. Goodness knows the struggles as parents we have with just one or two, even with some time in between. Then to compound that with cameras on top of insecurity issues. Just a recipe for disaster.
Based on her comments about her own upbringing and feelings of being the outsider, to me, it's no wonder she is the way she is. Trying to be "perfect" has only resulted in failure, not only at her expense, but of those closest to her. Neither is less guilty than the other. They just didn't see together the need to work as a team emotionally to stick it out. Everybody loses.
I'd truly question her if I didn't hear her talk about the kids, but it's so much so now that by "defending" herself and actions, she really comes across as insincere.
But bottom line, I don't know her, so really what do I know?