Oh, jeez. How long ago was it...?

[Alphys taps her buckteeth with one finger and looks up at the ceiling, still smiling. But then she remembers - it had to have been around the time when Sans left the lab.

Recalling this fact suddenly makes this conversation extremely awkward.

Her smile fades instantly, and she looks back at Papyrus like he's just caught her browsing Mew Mew hentai.]

.....uhhh, w-well, now that I think about it, I don't really remember when exactly!! B-But you were little! Very little, and so cute!