What if you climbed the rope in Genocide?

I was testing that if I wait, will she come back again? and it really did, thought of it a little then decided to go and leave her, so I played as Genocide, (haven't saved once), and when I was going for micro froggit I remember her, so went back and found her, then this question came to mind: what will happen if I climb it now?
the answer is:
nothing special will happen, and you'll get back to your last save, suddenly, I actually haven't saved once so I went back to the time I met Flowey at