TSA shouldn't care; it isn't their job to count carry-ons for the airlines.

However, there are reports here at FlyerTalk of individual airports harassing passengers based on counting carry-ons. (Admittedly, these reports are a little old, but who knows ...)

I would hope that if you explained that you're meeting your husband at the gate with his carry-on, it'd be ok. But with TSA, who knows ...

(For those scoring at home ... 6, 9, 24.)