Help me.. I’m drowning

[Abbz1990]

Hey.. I haven’t ever written in here before, but I need a place to vent my frustrations.
My step daughter(13) moved in with my bio children, partner and myself November 2018. We’ve had a rocky road to say the least. Between boyfriends, girl drama and social media issues we’ve had some time of it.
She recently (October 2019) got back in touch with her mum again after not speaking since March 2019.
Her mother is an alcoholic and a drug abuser so we try to limit contact, however we all know how teenagers can be. The more drama the better.
For 11 years her father did all of the running about. From middle for Scotland to Glasgow, every weekend might I add. Since she’s moved in with us her mum has picked her up 3 times and made some excuse as to why she couldn’t drop her off again. Thus meaning my partner has had to pick her up so she can go to school.
As we both think it’s important that she has contact (limited) we have had little issues in picking her up, however am I right to be angry that once again she has manipulated my partner into agreeing to do one of the ways.
I’m just so lost in a fog of confusion and bitterness I can’t seem to see the light.. help please 😩

[ColaFreezePop]

Is her mother still an addict? If so then you don't actually want the mother picking up and dropping the child herself if she is doing it alone as she can't be trusted.

[Abbz1990]

She doesn’t drive so no issues with transport

[Greendayz]

If the mother isn't driving then presumably DSD is coming by public transport, in which case at 13 why not talk her through doing it alone? That would stop any problems of her mum not wanting to "take" her home. Or is the problem partly that your DP does drive and DSD's mum (and possibly DSD too?) would prefer her to get a lift?

Otherwise why not just accept that travel is shared, her mum picks her up and DP brings her home? I realise you'd quite like pay-back for all the years when DP did it all, but maybe that wasn't fair then and expecting her mum to do all the travel isn't fair now either (especially with no car)