That's how it works, yes.

Anko?

swartzwald said:

Anko?

It's wordplay on Kyouko's name.

「杏子」is the compound for apricot (read as "anzu"), and is also the Kanji for Kyouko's name. Sayaka is switching from reading it as "Anzu" to "Kyouko" halfway through as a pet name.