Frankly, she'd prefer the scowl to the concern. Anger is something she's used to from Nico - they've had plenty of arguments, albeit about far less important things. Seeing her worried for her, as a friend, makes her uncomfortable. Makes her realize how their relationship is shifting.

"Anywhere private would be fine. If you don't mind putting off our shopping for tomorrow, would you like to visit my home? The invitation to dinner still stands. We have plenty of spare bedrooms, you could even spend the night."