"Subaru?" She sighed dreamily.
"You're being serious? You're not teasing me? You're actually giving this poor demon girl a chance and aren't pretending?"
She's laying it on thick, her twisted version of teasing, but it's still flirting, just in her own way.

The succubus gives a gentle poke to the gentleman's nose, more flirting. He's hit a special sweet spot in offering her food, being receptive to her advances? She needs to work harder to get those claws in him even more. With a sadistic smile she'd look him in the eyes, giving that succubus charm
+

The beatings will continue until memory improves~

Or....
You could come and hang out with me, you know?

Fufufuf hands down

Etna doesn't care. She's the man in the relationship.

Wife number 2 <3

Or 1 now