Lily was, as James had noticed earlier, a fairly observant witch. She noticed that he was smiling at her in that way again, the one that was a bit awkward and very sincere, and the one that was infinitely more attractive to her than his more typical arrogant smirks. Of course, she was hesitant to connect the words 'James Potter' and 'attractive' in her head, but she couldn't help herself when he got over himself and decided to be sincere. As such, James got a smile in return before she spoke: fleeting, perhaps, but definitely fond.
Because James had the consideration to genuinely answer her question instead of blowing it off, Lily gave him the consideration in return to genuinely listen and consider the things he was saying. When he mentioned the reason he never let anyone see they had actually injured him, though, she frowned slightly, the tiniest of creases furrowing its way between her brows. "But that only applies to people who want to hurt you. Most people, you're better off letting them know if they've upset you, because then they'll know not to do it again," she said slowly, not catching the implication James had made to their interactions. Of course, this was advice Lily was better at giving than using. She was one of the worst culprits at hiding her weak points.
Just because she didn't catch it didn't mean that she wasn't mulling over James' statement in her head, though. Just what were James' weak spots, anyway? Except perhaps for his pride, Lily certainly didn't see any. He had seemed to be able to brush off all the barbs she'd thrown at him over the years, after all. When he mentioned the casserole, it startled her out of her reverie just a bit. "Oh, um-no, I just haven't got there yet," she replied, reaching for a slice of the casserole and taking a bite, now that he had mentioned it. It was a good casserole, and she smiled for a moment at the taste. "We're so spoiled by the house-elves, truly."