I am sure Lewis is being paid. Any outside expert on any topic-- mental health, blood patterns (like the famous Henry Lee) or autopsy results (like Michael Baden) would be. That doesn't mean their testimony is automatically tainted though. While opposing counsel will try to imply a witness is saying X only because he/she is being paid, we can't expect people to work for free. And it's not as though the state's mental health experts from Pueblo work for free. If defense experts couldn't be paid, how could our system work?
It's also true that Lewis is an expert in dissociative disorders. But that makes sense. If a defendant was claiming schizophrenia played a role in the crime, the defense wouldn't hire an expert in dementia.
I have no idea what Lewis will say and whether she'll be credible. But knowing she's been paid won't be an important factor for me.
JMO