OMG! You and I could have the same mother, except mine had two children (and we help keep each other sane when she goes off the rails). We're even the same age. My mother cannot keep friends, she decides people are dead to her for the most trivial reasons, she snipes at people and uses their weaknesses against them after being sugary-sweet to make them put down their guard.
She's also an attention vampire. If someone in the family has liver disease, she must have it, too, that sort of thing.
When I had my first baby, I had complications leading to a rushed EMCS after a long home labor, newborn DS and me separated for first several hours, and I spent a week in the hospital that got very scary at times for my own personal health.
Two days into this ordeal at the hospital, I felt an almost biological need to talk to my mother. I was on a mag drip, suffering from the effects of a spinal that had been botched and had bruised the hell out of my spine.
I knew it was a bad idea! I don't know why I did it, I just...knew she'd had a c-section with me, and thought maybe this would be one chance for her to show me some empathy, love, and all that stuff I was missing during my childhood. So I phoned her (we'd spoken once since the baby's birth, for about 5 minutes in the rushed sequence of notification calls -- DS's weight, length, etc.).
She didn't ask how I was doing. She didn't ask how DS (her first grandchild) was doing. She wanted to talk about how she'd thrown her back out cleaning. The conversation went on 15 minutes, and it was ALL about her. The fact that I'd just given birth was not even a footnote.
The moment I hung up the phone I told DH: "I will be telling people about that call for the rest of my days, that's exactly who my mother is in a single conversation."
I'm pregnant again, with another son. I've had horrible morning sickness and still have it (I'm 19 weeks). I mentioned how sick I was to my mother, having a bit of a moan, I suppose, and she suddenly has this story about how she was recently diagnosed with gastroparesis and is always sick, "it's like having morning sickness that never ends, you know."
Talked to my sister (a medical professional) and my mother never got that diagnosis -- she was going in for tests to rule it out after having a single episode of vomiting.
This is all just to say: mothers can be awful. I find it comforting somehow to know I'm not totally alone -- maybe you'll find it comforting, too!