[s12e23] At Last Here

Explain the and why his arrival was so controversial.

: 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. [S12E23] At Last

Struggles with Kyle’s (Wilmer Valderrama) health decline and her choice to prioritize her career over their relationship. Explain the and why his arrival was so controversial