I have never had a close relationship with her. Her dad married my mum when I was four, but I have known him since I was two, I dont know "the sperm donor" who contributed to my life, so my "step"dad is the only dad I know, and it makes no diference to me iyswim, he is my dad.
SS used to be close to my older sister (4 yrs older than me) as she moved into the house with us when my sister was about 17, they used to go out, and she was close to my younger sister (half sister to us both), but we have never been close, I use the term openly hostile, she has never really liked me. But it didn't stop her ringing my dad, crying and saying she was upset I hadn't asked for her daughter (my neice) to be my bridesmaid at my wedding, so I went for family peace and asked her.
SS was not around when my dad had a nervous breakdown, it was my mum, me and 2 sisters picking up the pieces. She was not around when there were big family problems last year with my aunt (who other story, again very sad)
SS has only ever really "needed" my dad when she has been in trouble (i.e. when her husband caught her shagging the next door neighbour) and only goes up a few times to see him, she has let her children do what they like so they do get a little told off at my parents (they have never really been told "no", but my parents will tell them to stop throwing stuff around etc) but MY DD also gets told off at my parents if she is being naughty, so its not special treatment.
Am just fuming. Cannot believe she has done this. She even put in the letter that her brother feels the same, mum has spoken to him and he knows nothing about it
My poor dad