A bit of background, I'm 29, and have been married for almost four years. My mother is very conservative, socially. She tried very hard to stomp traditional gender roles into my head. I went to college and then grad school, and changed my mind about pretty much everything she taught me because it no longer made sense. Despite the fact that I've been very socially liberal for many years, she chooses to blame DH, and it's starting to make me very angry and uncomfortable. It makes it impossible to have a conversation with her.
Whenever I express an opinion that she doesn't agree with, she blames DH, usually in a very insulting manner. She says things like "I didn't bring you up to do (x)" or "I didn't bring you up to
think (x)" "so DH must have told you to have that opinion." She accuses DH of controlling me, and if I agree with DH instead of her, she insists that I only agree with him because I'm
afraid of him, which is not remotely true.
She is convinced that I am incapable of independent thought, and any views or beliefs I have that differ from her own, or what she "brought me up" to believe, she assumes that I'm just being a sheep and parroting DH's opinions. It is beyond frustrating. So whenever we talk, she invalidates everything I say and writes it off as stuff DH told me to think. And she
honestly believes this. And she's started to apply this belief to other aspects of my marriage. If she finds out that I told DH to pick out a piece of furniture, or decide where to hang a picture, she accuses me of allowing myself to be controlled.
It's getting to a point where I don't want to be alone with her, and I feel guilty.

Whenever we talk on the phone or are alone together, the conversation goes from "normal" to her accusing me of being manipulated and controlled by DH because I disagree with her. Usually, she starts yelling on the phone.
I've all but given up trying to convince her that my opinions are my own and have resigned myself to knowing that she doesn't think anything I have to say is important because it's just what DH told me to say. It's so insulting.
Does anyone have any advice for me on how I can cope with the fact that my mom thinks I'm incapable of independent thought and doesn't value anything I say? Or if you're psychological geniuses, how I can get through to her?
And I feel bad for poor DH, who hasn't done anything wrong. He's quite harmless. She's just choosing to blame him for parts of my personality that she doesn't like.