Hi Faded,
Just a little about me first, I am a Non married to a NonH. I have 2 DD 13 and 16 from previous marriage to BPDH. I remarried 6 years ago and have 3 SS, 8, 10, and 15. Their mother (exW of my NonH) has BPD. Also have a S 2 with my NonH.
So, I can say, that I can relate to the whole iphone thing. If your DD Mum wan't promising it, then she would have been bugging you anyway for sure. My 3 teens all got them for Christmas this year and my 8 and 10 yo were jealous! Needless to say, they didn't get much else... . I would say to get your DD a proper drop proof/waterproof case right away. I wouldn't even let my kids out of the house without their otterbox or lifeproof cases on them for sure.
But yes, pwBPD have shifting mostly selfish frames of references at all times.
I am sure BPDmum wants her DD to be happy.
Mum has problems with boundaries and setting limits so saying No to your DD is probably very hard.
Yes, she knows you have the cash to pay for this, but she lacks the parenting ability to talk with you first and make this a joint decision with all financials worked out before hand.
I doubt you enter into her picture much at all except to finance what she believes is necessary for your DD social survival- iphone, trainers, et al.
In my case, BPDbioMom used to come up with these extravagant "Santa gifts" that Dad would have to pay mostly for or at least 1/2. These were gifts that were just given to the kids at her house since she usually had them on Christmas Eve. They came from Santa but the kids got them at her house and then they would come here for more presents that we had to pay for as well later in the afternoon.
It drove me nuts, but my NonH went along with it, mostly to just keep her quiet. Even though they have 50/50 custody on paper, the kids have always spent majority time here, so it was more frustrating to get them these nice gifts that sat at her place unused most of the time.
In the end, we all survived, and now she lives across the country and my SS only see her on school vacations and the occasional disney weekend when she flies in. Her mom employs and supports her and so now finally, she at least, buys them the Christmas presents from her. Since she contributes nothing to their medical or other costs throughout the year, she doesn't bug us for money either lately.
Ok, back to your situation:
I think that this is a triangulation sort of thing going on. It's not exactly easy to see who is the victim as it keeps shifting.
It's good that you recognize that this is a pattern. I think this may help shed some light on things.
PERSPECTIVES: Conflict dynamics / Karpman Triangle
https://bpdfamily.com/message_board/index.php?topic=108440.0It's never easy dealing with these things. I don't have easy answers as your DD seems to be level headed. I think just making sure that she is not using Mum's promises in an overly manipulative way... . though it's hard to tell with teens anyway as they tend to be pretty pushy to get what they want, especially when all their friends have these things apparently
