It could also be seen as a cya text if in fact she did do this too. We won't know because the older kids were not initially asked about her per the Complaint, and now they may have been subject to pressure. JMOOO.
Her focus on him rather than the surviving kids is just more of the same. That he was released home does not bode well for jail time. He is not a good guy, he is reckless re: kids, lies to LE in easily disprovable ways, ignores court orders, etc. But, often those people skate through life. Had he done this to someone else's child, with a repeated pattern, he'd serve time. Being victim focused, to me it should not matter, Parker's life and the safety and wellbeing of her sisters should be paramount.