I am new to this forum but not new to step parenting. DH and I have been married for almost elven years, and together for about seventeen. He has two children from his second marriage, SD1 and SD2 who are 21 and almost 19. We have two children DD1 and DD2 who are almost nine and three.
DH's children and I have not always had the best relationship, and that is especially true with SD2. When SD1 left for college when SD2 was 15 she stopped following the custody arrangement and refused to sleep over anymore. At the time she was in therapy for clinical depression and we thought that once therapy started going well and she started getting better she would resume the custody schedule. That never happened.
Flash to now and both girls are in college. This is the first year of that so it has been quite the adjustment for DD's. DD1 and SD2 have always been very close. They have a special relationship because they are both very similar. When SD2 did come to our house her and DD1 would hole up in her room and read together for hours. DD1 adores her.
We always get the girls for Christmas because their mother is Jewish and DH is Catholic. This year they spent less than a week with us for Christmas. When they left DH suggested that they stay another weekend later on. He brought this up again the other night while with SD2 and she claimed that her going revolved around SD1's work schedule. SD1 agreed to spend the night this weekend and SD2 suddenly turned around and refused. SD2 and DH got in a big fight over it. She claimed that it was her birthday celebration with her mom's side tonight and that she had already told DH this and that she wouldn't come because of that and the fact that she leaves on Monday to go back to college.
DD1 answered the phone today when SD1 called to talk to DH. She asked her if she was coming tonight and SD2 just kept replying 'I'll see you on Sunday at your birthday party. SD1 is coming tonight. I am not.' She did not give DD1 any reasons beside that and repeatedly asked to speak to her father. When they hung up DD1 began hysterically crying and saying that SD2 PROMISED she would sleep over. I texted SD2 and told her that she had severely hurt her sisters feelings and made her cry. SD2 did not text back but called her father and told him that I was 'interfering in her life and she would not stoop down to her (my) level.'
I am at a completely loss at what to do and to tell my DD1.