i feel like the punchline here would be that she says no, but then you see it from her perspective and she just always sees her radiantly like that because she's already in love
i bet its something cheesy like, "you always look radiant to meeeeee"
This. It's gonna be something like
"I don't see anything different."
"Aw. but it's said to make your fated one look radiant."
"But you always look radiant to me."