You like her and you would like to be your true self to her, even if its for a moment. If this is the case, Its a nice sentiment.
I understand everyone have their own way of showing their love and affection. For example, before buying a gift for a loved one, some people thinks "What would they like/want?" then there are others who gets what they think is "right" for their loved one and ofocourse there are other approaches/paths but this will suffice I think.
I don't think I am capable of directly answering whether you should reveal your possible intent to her.
There are so many things to consider but to name a few ...
In terms of relationship levels, do you think you're both on the same level?
Regardless of that, do you think she's like minded or atleast would try to understand?
If she isn't like minded, would you be able to handle it?
Could she not being understanding result in you being put under observation or psych ward or similar (she might do it out of love, like every other person out there).
If she's indeed like minded and understands and respects your wishes, it might still result in putting a heavy burden on her.
Provided she understands and is supportive of your choice, by informing them, you might be putting them in a awkward position with law and sometimes they might go as far as to try to persecute her (depending on specifics ofcourse).
And a lot more can be said but I think this explains to some extent and perhaps this might assist you in some way.
Whatever you decide, hope it works out for you.