I think they know, they just aren't like, idk the correct term ╥﹏╥ crossing that line yet? Aster knew about the curse on the first evening where they kissed plussed Vio saw his face after bang bang so uh, yeah, they're not confronting that fact atp Σ(  ̄□ ̄||)
How they don't recognize each other like, the voice? Body? Everything? That's so silly