I am clueless

Lunch today was a chard soup, but something went wrong, and it was...wrong, somehow. Not inedible, but unpleasantly sour. It was fine enough with a bunch of salt and pepper, and the fried potatoes.

I was eating alone, and Ximena stopped in the hallway and asked how the chard was.

"Well, it's fine."

"Oh. Huh. Yeah."

"No, I mean, it's--"
"Ya, ya."

"It's fine with the potatoes."
"No, don't worry about it."

Dinnertime rolled around. Normally dinner on weekends is the same food as lunch, but there was a sudden new soup (which tasted as good as normal). Ximena put it on the table with her finger to her lips.

I looked at her quizzically. She kept her finger to her lips and made some waving sounds, as though I shouldn't mention it to Oscar. Though Oscar came in a few minutes later with a salad.

What just happened? Did I insult somebody or get overly picky? It seems clear they also knew something went wrong with the chard.

Who knows?