Is Blac Chyna about to become a Kardashian or they are just teasing? Lol

The entire Kardashian/Jenner Clan are currently on a secret vacation planned by their matriarch Kris Jenner. Even Scott, Kanye & Tyga are on the trip. Now Blac Chyna shared a photo of herself with her boyfriend Robert Kardashian Jnr, with a sparkling ring on her finger and wrote Yes, like...maybe they are engaged? She wants to give the Kardashians a heart attack? Lol.