She has every legal right to not talk to the cops.
Just like Terri Horman had every legal right to not talk to the cops.
However, CPS also has every legal right to keep her daughter.
Just like Terri Horman lost all rights to her daughter.
If her priority is getting her older daughter back, it IS in her best interest to cooperate.
I do not believe they will give her custody back if she isn't cooperating.
It would just be too risky to the older sister.
Without knowing what she knew and when she knew it...
How can they possibly trust her to protect the sister?
Maybe it hasn't been worded that way to her yet? I can't imagine it hasn't.
Obviously she is talking to CPS on some level since she is having visits.
However, I would think that LE will be a part of the custody hearings.
So even if she's cooperating with CPS, she isn't cooperating with law enforcement.
The judge won't be impressed that she isn't cooperating in the investigation.
Unfortunately I think she may go the way Terri Horman did.
Refuse to cooperate and lose her daughter.
But TH has been implicated in Kyron's disappearance, whereas SM has not been implicated in her daughter going missing, and her husband has confessed to injury of a child. I would think she also has been going by legal advice given to her by her lawyer at this point in time.