You could also just tell her that you’re happy that she is so happy but you’re not into bags or luxury stuff so maybe the two of you can just focus on the work ahead of you. I think “not caring” is sort of the ultimate “above it all” attitude.

Ok, so assuming this is like, her first bag because she’s so excited about it, and since she’s bringing it to work, I’m gonna assume it’s one of the Neverfulls or another coated canvas workhorse style bag. Those are entry level luxury items and very popular with the type of people like your coworker.

I just worry that a bag aficionado like her who talks so much about her LV either has bought a fake and is covering and could be actually kind of savvy when it comes to IDing fakes. Better to buy not a fake LV but a fake bag that is even higher up the food chain but not so high that it’s obvious you bought a fake. Chanels are really expensive and if you come in with one out of the blue it will look like a fake. LV is the most entry level bag so to suddenly upstage with a bag that costs 5-10x as much will invite more questions.

If I were in your shoes and thinking tit for tat, I would go the Goyard route. Their classic tote is in the same category as an LV Neverfull - coated canvas. It’s a “quiet luxury” symbol and kind of has an “I don’t care” vibe to it, but is well known by people who care about fashion. It’s a quiet upstager bc it also shows you think that LV is loud and tacky. Like you seem to think your coworker is.

The other bag that is classier than LV are the old Phoebe Philo cabas totes. Not too expensive on secondhand sites these days. Minimalist and exuding “not trying hard” vibes.

If you really wanted to upstage AND disorient her in her own loud and tacky language I would go for a Balenciaga x Gucci collab bag. Those things were crazy when they were released. Super limited edition too. Not sure if there are dupes but you can try.