Two women in my workplace who don't quite see eye to eye. One of them was going to be off the next day, nobody knew what for but that's her own business. As a result, the other one was going to be covering for her and working with me.
The one covering walked into the room and I said, 'hey I think we're working together tomorrow.'
She said, 'why, is Laura not in?'
I said 'No I don't think so.'
I realised straightaway I'd put my foot in it. However then tried to tell myself that they'd have obviously seen that Laura wasn't going to be in the next day when she didn't show up to work, so it was hardly a secret.
The other colleague, Joanne, is a bit pissed off as she thinks Laura keeps having time off and then she has to cover.
Anyway, I didn't know this would happen but Joanne marched into the other room and asked why Laura wouldn't be in the next day. Laura started saying, it's none of your business, and they got into an argument.
Laura came to me soon afterwards and honestly started shouting at me asking why I'd told Joanne she wouldn't be in, saying quite hurtful and upsetting things.
Honestly was just making conversation with Joanne, and I tried to reason with Laura, saying that they would clearly see tomorrow she wasn't in and that I didn't know it was to be kept quiet, nor did I divulge the reason (didn't know it myself).
She completely flipped at me and our boss agreed I'd been in the wrong to tell Joanne that I'd be working with her tomorrow.
I didn't think, I had no idea Joanne would go and ask Laura why she'd be having a day off. There was no need to do that, and also no need for Laura to scream at me. I won't say a word next time, but Joanne could have easily done the same thing when Laura had returned from her day off.