Zeuhl.........LOL.....interesting question which I will try to answer.
My biological mother expected me to accept her as my mother which I couldn't do. I tried to explain to her that arriving with a plaque around her neck stating "Mother" just did not work.
I admired her for the emotional trauma, that she must have gone through handing over her baby, but subsequently she had two other children. After we met, she suffered more than I did emotionally, as my mother was the person that had brought me up.
I didn't really work at it, as it was not that important to me, but Mrs sqad had words with me to the effect that I should make an effort for my maternal mother's sake and this I did.
I don't think that I made a particularly good job of it, as most of the ABers will testify I am not that sort of bloke.
I gather from other people that she was extremely proud of me and I admired her as a person rather than my mother.
She died 2years ago and I didn't (couldn't ) grieve.
I hope this has helped Zeuhl.