Kitty: You know... Flowey is actually a ship kid. So is his father.

Alesia: What do you mean?

Kitty: Flowey is Alphys and Asriel's son.

Sam: That doesn't make sense...

Daniel: How?

Kitty: ... Asriel's dust and Alphys was the one who injected determination into him. Two things that made Flowey who he was.

Alice: I never thought of it that way...

Kitty: Exactly.

Alesia: So... wait. How is Asriel a ship kid?

Kitty: Toriel and Asgore.

Alesia: Oh. Right.

Kitty: Exactly.