[s12e23] At Last -

: Meredith decides to sell the house Derek built (the "Dream House") to Callie and Penny, as she feels she is finally ready to move on from that chapter of her life. Major Character Developments Development Meredith Grey

The episode centers on several couples reaching critical turning points. After a season of "will they/won't they" and professional tension, Meredith finally gives in to her attraction to Nathan Riggs. Meanwhile, Owen and Amelia take a massive leap in their relationship, while Jo and Alex hit a definitive wall regarding their future.

Reaches his breaking point with Jo, choosing to walk away rather than stay in limbo. [S12E23] At Last

It leaves in a volatile state, leading to the misunderstanding involving DeLuca in the next episode. If you'd like, I can:

It establishes as the primary event.

: After weeks of bickering over patients and Meredith acting as a barrier between Riggs and Maggie, the two have a heated argument in the hospital parking lot. The tension turns into a passionate encounter, marking Meredith's first significant romantic step forward since Derek’s death.

: Owen decides to sell his house, signaling he is ready for a fresh start. After some soul-searching and a conversation with Amelia about what they both want, Owen proposes. Amelia says yes, and the two decide to get married almost immediately. : Meredith decides to sell the house Derek

Explain the and why his arrival was so controversial.