Swedishmum. You sound like you've come to terms with it at least. I've been trying to for years. Intellectually I know to expect nothing but it doesn't seem to translate emotionally and I still feel hurt and tense within hours, minutes of her arrival.
Arfy I did a similar experiment after a particularly tense phone call with my mum and waited, without calling her, to see how long it would take her to call me. Meanwhile I had an operation which went worng and became infected (she knew all this through my sister) and I lost my job, but still no call. Eventually she called me because her dog died and she knew she had been re-installed in the neediness stakes. She was now top of the victim tree and all I could do was be supportive and sympathetic. There. Harmony restored for her.
That's the thing with my relationship. Either I mother my mum and look after her and listen to her go on about all her problems all the time, or I have no relationship with her at all. My needs don't come into it. In fact, she actually fears my needs and those of my brother and sister. If we are ever even slightly needy, she goes into retreat of somehow finds the neediness trump card and plays it.
I look at other mothers enjoying their grand children, happy, nice to their daughters and I feel so hurt. God I'm forty now and however much I tell myself to let go, stop caring, accept the status quo, howver many books I read it doesn't seem to get through.
All I can do is try to do better for my children.