From my understanding: Tyler made a ring out of hay to propose to Anastasia with, Lady Tremaine didn’t approve of said ring, and Kelsey hopped in to give him a better ring to propose again.

Meanwhile, I just stood next to a confused Drizella…
Driz: “Wait…isn’t he…your…?”
Me: “Yep.”

Lessons learned: don’t let the boyfriend meet the Tremaines. You will get replaced.