It could be, thing is she never shows much emotion so it's hard to say. She definitely gets emotional when the topic of drugs comes up. But whether that emotion is anger or sadness or something else... I simply cannot tell. You know when she's getting emotional but you don't know what the emotion is and she will try to hide the fact she is feeling anything. If you try to ask her she will just get defensive and start turning it back on you. She never admits to caring about or feeling for anything.
It seems to me though that if you indirectly wish death on your own son right to his face that is a lack of empathy.
I won't go through my whole life story on here but I have plenty of reason to believe she is at least mildly sociopathic just going off her general behaviour and how manipulative she is. I remember when I was a kid she bragged about how good she is at manipulating people and was trying to teach me.