To tell friend about job... or not

[FrenchFancie]

Bear with me, this might take some explaining.

Both myself and a friend went for the same school office job at our daughters’ school. Both got interviewed a day apart, neither of us have any experience. The school has taken over a week to get back to us. She’s just had an email saying ‘we’ll get back to you early next week, sorry for the delay’.

I’ve had a phone call offering me the job. Arse. We both knew that this was a strong possibility to happen _ we can’t both do the same job after all! But I would normally post on social media that I was pleased to get the job (first successful interview in 8 years since I had DD and my confidence has been rock bottom). I’m not going to post, obviously, but AIBU in leaving her over the weekend,or should I find a way of telling her? I don’t want to gloat, but if I were in her shoes I might want to know. We won’t see each other over the weekend, so I don’t have to lie or anything, I can just keep quiet

AIBU by not saying I know the outcome?

No you dont tell her because it's not your job to tell her, it's the interviewers job.
If I offered you a job and you promptly told another candidate I would have serious second thoughts especially as confidentiality is key in schools.

I would probably withdraw the offer - if you plan before you get here what will you be like when you're here and know and see more?

If you plan should read if you blab