Fitzpatrick:

So, I'm trying to picture the logistics here. Seems that some contortion would be needed to remove the underwear first.

If you want to see how to take a bra off under a shirt just watch Flashdance...

Of course it is much easier with oversized shirts like she wore in the movie, I can do it if I wanted to but I would wear a bra all the time if I could, I find it much more comfortable then letting DD's swing.