My parents don't know of my 9 years of abuse but both my father and mother suck and my mother is the bitch of the family. I am an only child so my mother could not say something like that but you would always use the same tactic that yours did to you to just upset me. She would say something and then back off by saying maybe I shouldn't have told you that. It's easier than physically slapping you in the face. Not only that she would always say something embarrassing and in front of people or within earshot of them. And when I would make a remark she would apologize to me but she already told everyone in the room so the I'm sorry shit really doesn't work.
Sound like she doesn't give 2 shits about you and your issues. She is using the abuse by your uncle to get her jollies.
Peace, Rainbows, Love & Healing
Stick around, It will get better....