This is after Lucifer talks with his father since we all know what happened after he went back to hell to save Chloe. Chloe kissed Lucifer first, as a sign that she wanted to be with him and wanted him for who he was, putting herself out there, for him. Now it's Lucifer's turn.
Lucifer walked out of the small room, his eyes tracking the ground, mind racing. It's real. It's truly real. Stopping in the middle of the hallway, he stayed with hunched over shoulders, his hands shaking in his pockets. didn't know whether to laugh or cry from happiness.
Then he knew. Because a small, tough figure appeared in his peripheral vision. Lucifer picked his head up and turned towards the figure, light in his eyes. Chloe. Chloe Decker.
Her wide eyes on him in concern, he mirrored it; still with flashbacks of how she suffered from the poison. Chloe smiled at him and he studied her.
He took a step towards her and she stood still, letting him come to her. Not knowing what he was going to do. Not knowing what he was thinking. But the hesitance in her eyes showed him she needed something for what she was giving. And she had given him so much, so much faith, so much affection.
Before he was knew what he was doing, his step towards her turned into a walk. Then a charge. still Chloe remained steadfast. The beautiful and kind woman who felt something for him.
Lucifer reached out with both hands and gently stroked her hair back behind her ears, back into her ponytail, before lifting her face slightly and locking his mouth to hers. She immediately responded, kissing him back and bringing her small arms around his neck. Right there, in the middle of the hospital. Dan and Amenadiel not far away, in fact they probably witnessed this. But all that went through Lucifer's mind, was bringing Chloe, closer.