Unfortunately neither of them makes any sense, at least to me.
Twinkle is a word that is used when talking about light or a shiny surface.
--> to shine repeatedly strongly then weakly, as if flashing on and off very quickly.
However, if we only look at the grammar, then these examples would be correct:
"She and I are always twinkling."
"She and I will always be twinkling."
"She and I will always twinkle."