Dp is away just now, dsd came down for her contact time as normal. She chose to stay at sil's house overnight as she has her similarly aged cousin that she loves spending time with. Thats all fine.
The following day I go round with clothes etc for dsd and a vague idea of something we could all do together and discover that sil has made and organised plans involving dsd, including getting in touch with dsd's mum to sort out when and where she could collect dsd.
This all took me a bit by surprise because I had assumed that as step parent, it would fall to me to make and arrange plans to do with dsd, or at least be consulted about sil wanting to make plans.
But sil obviously thinks that as an actual relative , that it falls to her.
I didnt make a big deal about it, and went along with sil's plans, but went with them rather than letting her take dsd away for the day. And when we are out and about its me that dsd asks for permission to do stuff, so I guess she sees me as the person 'in charge'?
What would be the 'normal' in this situation?