"Well, you may as well have said as much," she protested, a bit of snappish anger sliding into her voice.
She exhaled softly before she shook her head, hands smoothing out her skirt. "Is it such a surprise, Severus, really? Who else would I want to work on a potion with? Even if you ... if we aren't ..."
Realizing she was painting herself into a corner, she made a frustrated noise and looked away - though she made no move to leave.