SD's mum has always been a bit selfish and has always tried to buy SD's affection that do anything to build a genuine relationship. Obviously this worked better when SD was younger and equated Mummy buys me more toys = mummy loves me more, however as she has got older she has realised that her mum gives her little emotional support or affection and indeed did alot to knock SD's self-confidence (never happy with school results etc, if SD got 90% in a test, mum would shout at her because it wasn't 95%, telling her she was putting on weight and had a "fat ass"-SD is a size 8 but tries to diet because of yrs of similar comments). SD herself has pointed out that her Dad and I might not buy her as much (obv buy what she needs but not designer clothes and make-up on a weekly basis!) but we talk to her, consider her feelings, support her and, most importantly to her, we have fun when we are all together. There are other issues about her mum leaving her to get herself out to school in the mornings (and indeed it was Sd's responsibility to get mum up for work) and never cooking, it was takeaways every night, but don't want to bore you.
More serious difficulties began when SD started secondary school in Sept 09, she had real, genuine, difficulty settling in and her mum gave her little/no support, don't want to give a huge amount of detail in case I "out" myself but this resulted in SD staying with us for 6 weeks, after her mum threw her out for expressing her worries about school, stating that she had had enough, during which we worked through the issues with school and she was much happier and more settled (this was remarked on by her Year Head at school, and by other teachers, not just our view), however her mum wasn't happy for her to stay with us permanently and we agreed on 50/50 custody which lasted for the rest of the year, however throughout this time the relationship between the two of them continued to deteriorate, her mum putting pressure on her to stop staying with us and SD not willing to do this, combined with a ridiculous and unrealistic pressure academically and constant negative criticism about her appearance and numerous other things.
Things came to a head on SD's last birthday, which I think is terribly sad. She had asked for a "house party" (just a few friends for food and some music, very very tame) but her mum wasn't willing, so she had it at our house (this was actually her mum's suggestion, as she didn't want the hassle, not us trying to take over or anything). SD & her best friend went to meet her mum the next day and her mum instantly "let rip" at her, in the middle of a crowded shopping centre, tearing about her appearance, personality etc. Both girls were crying hysterically and phoned us to pick them up. SD told us then she didn't wish to return home to her mum and wanted to live with us permanently. We talked to her in depth about this, making sure she was certain, and with her agreement applied that week for a Residence Order (SD herself wanted it "official" as she was terrified her mum couldn't make her return to her home) but making it clear to SD that if at any time she changed her mind, we would not be offended/hurt and she just had to tell us. An interim residence order was granted in our favor, with contact with her mum twice a week for 3 hours each time. Difficulties however soon arose with contact, SD was returning home very unhappy as the criticism and really downright nastiness was continuing during contact. When this was pointed out, her mum said she, and her mum, SD's grandmother, were ceasing all contact, because the stress of the situation was affecting her health!
SD was very upset by this, whilst she had decided to live with us and granted that her relationship with her mum was extremely difficult, she had never said she wanted to stop seeing her completely, however since then, her mum has attempted to phone/text only two or three times, SD has said she can't pick and chose contact when suits her and has refused to respond. We have now found out mum is spreading lies about SD and this has added to SD's determination not to have any contact. We have blocked her from SD's Facebook and she is under solicitor's orders that any texts are to be directed through DP.
It hasn't been easy, especially as I was 20 weeks pregnant with DS1 (my first baby, after 4 years of fertility treatment!) when we had to make the residence application, but in our case it has been helped massively, I think, because SD and I get on extremely well, and are very close; I couldn't imagine having a step-child living with me permanently that I found it hard to get on with. What is your relationship with your SD like?
Sorry that this is a bit long and garbled in places (done between DS1's naps!), but I hope it sheds some light on a similar situation and if you have any questions please do let me know. There are lots of other issues about maintenance etc which are too long to go into now.