When Natasha answered the door she hadn't expected to find Matt Murdock standing in front of her with a pizza. Sure, they had joked about him showing up with food, but has she expected him to actually do it? Well, now that she thought back on her (admittedly new) interactions with him, she probably should have seen it coming.
"Dinner?" she asked, her voice low so as not to disturb the occupants inside the apartment. "Smells good," she continued after taking a whiff. "I'd invite you in to meet my namesake, but he's about to go down for his nap." She clearly enjoyed that the sentence might confuse him and she would offer no explanation if he asked.