Having a wife that's nursed all of our kids, I know how exhausting, taxing, and time consuming it is to pump on top of everything to keep the milk supply up. She's had to do it on flights before to keep the schedule. We carried her pump supplies all around Washington DC for four days to be able to keep up. That being said, I too would find it odd that she isn't using a designated area to do it. I'd try not to worry about it as she's not going to be doing it for more than a few months.
Unless she's one of those that breastfeeds until the kid is 4.