I agree with both of y'all, Kaffe/FaithAK. I do think something is truly bothering her, but the only method of expressing it - towards me, at least - is through negativity.
Speaking of which, allow me to describe to you how today's interaction went. On Saturday, I usually fetch our son from her place at 4pm, give or take. She would also usually text me to let me know, e.g. "You can come at 4". I've always thought we've done this because it's part of our communication process, as well as the times when our son naps a little over 4 and thus needs a little more time to wake up/snack/etc.
This is what transpired today - At 3:57pm I still had not received a text from my wife (usually she'd let me know by 3:45 at the latest), so I sent her the following text message:
M: Is E still napping? W: No.... M: I wanted to (be) sure. Don't want to come if he was sleeping or something. W: 4. Like the past 80 weeks.
I didn't respond because I was already on the way (don't drive and text, folks). But my response would've been like this:
M: Yes, and just like the past 80 weeks, you and I communicated about it.
This huffy-puffyness is taking a downturn, and I can't understand why. I'm not flustered by it, but I am bothered that our son is exposed to such negativity.