[X] No real point in trying to be sneaky here. Stealth isn't exactly your strong suit, and she probably already knows you're coming. Might as well just walk on through and say hi to her. It'll show you're not a threat and give her more reason to trust you. Though, you will be putting yourself at some risk if she turns out to be more foe than friend.
[X] You still can't tell if you can trust her and letting her know you're coming might give her the chance to get the drop on you. You'll just quietly dispel one part of her net before moving on. Hopefully, she'll understand your pragmatism...or at least not attack you on sight.