Her eyes go a little wide and that blush returns with no indication it'll go anywhere.

"I can't imagine Ellis exchanging embroidered handkerchiefs with anyone, much less me." Adrasteia shakes her head. She reaches into her robes and procures two handkerchiefs. "No, this was the Lady Sidony Rutyer. We had a meal, in Orzammar, and are friendly with one another. I sent her one back, that seemed... appropriate? But as much as I enjoy giving others gifts I'm very unused to receiving them, and so I wondered if I'd done the wrong thing."

Or if she's reading too much into it.