At the swimming pool for my DD's swimming lesson. In the changing rooms there are only two cubicles for privacy and the rest are benches. DD(9) prefers privacy and we normally manage to get a cubicle.
Today on arrival both cubicles were busy so we got changed on the bench and left our stuff on the peg. Half an hour later the lesson ends and I have to walk through the changing room to collect DD from poolside. One of the cubicles is now empty so I put our stuff in there and pull the curtain.
However when DD go back to cubicle two minutes later, the curtain is open and someone else's stuff is on top of ours. All the kids finish at the same time so I knew this person's arrival was imminent but I moved their stuff to a bench, closed the curtain and DD starts getting changed. Then the curtain is pulled open and a lady and her grandson are standing there. I apologised and said our stuff was already in the cubicle and I pointed at her stuff that I had moved to a bench. We were both wearing masks and it was loud in there so I couldn't hear what she was saying in response but she did walk away and got her DGS changed on the bench.
She couldn't possibly have missed our stuff being in the cubicle and all the kids finish at the same time so she knew we were coming back. As far as I'm concerned the cubicles are first come first served - if it's empty, crack on, if there's stuff there, you've missed out. WIBU in "bagsying" an empty cubicle for the two minutes it took to get DD out of the pool - although that's what the other woman was trying to do by putting her stuff in there with ours.
This is a weekly lesson with the same people so we will keep seeing each other - I just want to know if I was in the wrong!