Sure it has a chance of working if you are both willing to do this. But, as you've already noticed you are looking for a guarantee that you won't be rejected before you try anything....THAT will slow down the process. At some point (if she's not already there) if you do that, she's going to tire of you seeking approval before you act.
It's perfectly understandable how someone who has been rejected would want to know ahead of time that they won't be rejected...but arjnex be wary of constantly seeking her approval or asking for her permission, that behavior often make a man look weak in a womans eyes...and men who have to ask permission constantly from their W/GF often lose that woman's respect.
Sure, take things slowly with her...but you've already stated the best thing you can do....roll with the situation. If you you two are kissing and you feel like trying to take it further, try it...if she doesn't want to she will let you know. BUT, you might be surprised to find she's wanting you to be more aggressive too. Naturally I'm not saying jump right into that....but you will know how the situation feels, so go with it. You know her signals if she's into something, go with it.
