Ok so I ran into this problem, tried looking all around the entryway, I tapped the 'w' key, couldn't figure anything out, she just kept killing me when I approached her after the first dialogue box. So I Google it, landed here and read all the pages thus far and figured out a way for people to get passed this part whether you're on PC or Xbox...
I literally had to
TAP the 'w' key, wait 1-2 seconds to see if I triggered the response---and simply repeated that until she did tell me to stop again; to which I held my breath and was pleasantly surprised not being shot (repeat this process until she is grabbed, obviously). The problem is if you don't just tap the 'w' key (or however you do so with the dpad or analog stick) you literally will move "too far" beyond the zone of triggering just the dialogue and not overstepping your bounds with Brenda and getting shot.
Visceral games should release a patch or something, because it literally is a matter of milleseconds of tapping the 'w' key and you're dead. I went the whole Epi. 1 and 2 thus far without dying, but now I have died maybe 5-6 times just because of some
over-sensitive dialogue triggering mechanic.
P.S. Wow, there are some useless and rude people on here. Try not being douches maybe?