Bloody DSD's stupid fecking mother.
DSD lives with us and is supposed to see her mother every fortnight. Her mother doesn't work and spends every waking hour on facebook. Despite the fact that she has sod all better to do, she still doesn't arrange to pick DSD up until 11am and THEN texts EVERY TIME saying she's slept in/forgot and will pick her up at 1pm - she then turns up about 2pm.
This is really a regular thing and she only bothers turning up at all if DP reminds her that its 'her weekend' (as if she should need reminding to see her own ffing kid). Anyway after a stupid fiasco a few weeks ago where she said she'd be here at 11am (so dsd gets ready for 11) she turned up at 2.40pm and then brought her back at 4pm - DP said he would no longer text her to remind her and would basically pass the responsibilty back to her (DSD hates going anyway so she was all up for this).
4 weeks went by and we heard NOTHING from the woman. Then last night DSD got a text saying "why havn't you or your dad been in contact with me about seeing you? its been 4 weeks and I'm not happy". DP asked me what he should do
so I used his phone to text back "it is not my responsibility to organise your contact with DD, from now on, organise it with her, not me". DP tells me this is what he wanted me to put but couldn't think of the right words 
So she sent a text back saying "fine! I'm having her tomorow, I'll pick her up at 11am". So I sent a text back as DP saying "organise it with her please."
So DSD is ready for 11am this morning - 12pm comes and goes - 1pm comes and goes - I then got a text off DP saying "she's coming for her tomorow now instead". He'd text her whilst he was at work which totally devalues the texts I sent about taking responsibility for herself and apart from that, DSD has had another day wasted waiting around for her stupid mother!!!
AIBU in wanting to say something??