The mom contacted me again last night. This time with about 40 (yes, 40 text messages). The first few were about not responding to her email, about ten asking me what I was doing and if I wanted to get together, the others were just nonsensical. After about the 39th message, I called her but she didn't answer so I left her a message. I was firm but not nasty and told her to stop texting me, I don't have anything to offer her and the ACS worker is better equipped to help her but in the meantime she needs to stop contacting me and that was that. She texted me after that and said OK. These texts were also happening very late at night but I haven't heard from her since.
Thanks for the PPs great comments and advice. I went ahead and took one-girls advice this morning and blocked her from being able to send me emails. I have to call my cell phone carrier and ask how I can block her from sending me texts. I've already put ignore as her name so if she calls I know not to answer it. DH doesn't think there's anything wrong with her at all except she takes advantage of people and manipulates them. Whatever it is, I'm done and just hope her DD is okay.
Oh my goodness. She sounds really ill. What do you mean by "nonsensical" in reference to her texts? You're continuing to handle it very well -- it must be so upsetting.