I don't want to be the armchair specialist, but screw it.
Lori probably has some major personality disorder; I'd say BPD but that's a problematic and misogynistic diagnosis at the best of times, let alone at times of crisis. We do however know that Lori lies for no known benefit to herself or others (often only to her own harm), is prone to cults/cultish behavior, has problems with long term relationships, can't separate herself from men despite having an inability to commit to people or life goals in general, and demonstrably ignores the attachments and needs of her own children in front of her own conveniences and needs *with inconsistentcy.* So Lori's behavior and calling her own son (biological or not) a drug baby isn't that bizarre if you look at Lori's behavior patterns: to Lori, this is just how she is and how she behaves all the time, and has for a good long time. She's okay with lying and playing with people because her whole life, she's been pretty easily moving the world around herself. To her, why should anything else be different now?