Just the 5. Jacob and the baby nearly died with the last one so they are very careful now.

Aylen & Kaya. Luka's nickname for them is AK.

I don't know about the ages of Jacob & Edward's kids... Starry says there are roughly 5 years between them. Lilliana is the oldest by a few months. Luka is 17 when Aylen & Kaya are born, so they would have been 4 in that drabble I wrote since Luka was 21 in it.