Hi, I am a regular poster who is posting this on behalf of my friend (at her request), re her DSD (12) Post written by friend and C&P here.
May be long sorry!
BACKGROUND: DH wasn't aware of his DD1 until she was 3yo and he got a CSA letter. Wasn't required to pay as self employed then and I was PG with our DD1 (his DD2). He asked for paternity test, positive, and the mum readily admits she did it on purpose to get a council house (which she still resides in with her DH and 2 other DD's).
We have DSD during school holidays and since she was 9yo she has often rang and requested the visits, length of time etc.
We have 2 DD's 6 & 7 yo.
So Saturday I go to collect her with my DD2 and my DD1 one stayed home with DH, DSD asked that I go as she wanted to talk to me about 'girls' stuff she couldn't/ didn't want to discuss with her mum/dad or SD.
She really wanted a Blackberry phone which we had got for her and didn't even recieve a thankyou when we gave it to her. We don't expect gratitude like it's a favour but simple manners should exist.
Sat evening we went bowling as a family, she spent the whole time texting her friends (pretty normal at this age I would think!) which caused my 2 DD's to get a little upset but they also need to understand she is beyond 'playing' now.
At home DD's went to bed whilst she stayed up with us to watch a film - we try to give her time without the LO around.
Yesterday we went shopping, she chose a few bits and I needed a few winter things for me. We also got her some extra credit for her phone (her mum tops it up and it has to last) because we know she'll contact her friends more when she's not with them.
So here's the problem bit. I went to my friends (the one who's MN I'm using!) for a coffee leaving DH with all the girls. Whilst I was gone his DD rang her cousin and was talking very loudly (in the garden) about how we treat her as a baby and expect her to be free babysitting and that's why we want her to visit. That we treat her as a slave and expect her to go to the shop because we can't be bothered. Re these points DSD asked if she and DD's could go to park earlier and the shop is 700m away and when I needed milk (mid cooking - whoops!) I asked if she minded going to the shop and said she could chose something for dessert and it was up to her what we had. My DD's wanted to go with her and DSD asked if she could take them.
After returning home and calming DD's who could also hear what their sister was saying, and putting DD's to bed we tried to talk to DSD and find out what was upsetting her, what she wanted changed, if she was missing her friends and did she want to go home earlier than planned? (DH back at work today so not around daytime). DSD just sat there playing on her phone, refusing to look at us and when I asked her to put it down and stop texting for a minute she replied (rudely) that she had no credit so wasn't texting.
So the outcome is that it wasn't resolved. She refused to tell us what was wrong, says she doesn't want to go home, doesn't deny (anymore!) what she said but will not tell us what we can do to make things better for her. 
I know DSD feelings are the most important here but due to DH working hours I have done most of the day to day childcare with DSD on visits, I thought we had a great relationship, I took her on holiday with BOO and our DC's this summer because DH couldn't get time off, and I am feeling hurt.
Problem is I don't know how to solve this.
DSD won't be honest and DH is so hurt/ angry he says if she doesn't want to visit then she shouldn't.