3rd person's point of view
The Avengers arrived back at the tower with Leya. Leya was still unconscious. Thor carried Leya bridal style. "Get her to the infirmary", Tony says as he follows Thor. Thor and Tony went to the infirmary with Leya while everyone else stayed in the living room.
Loki sat next to Natasha on the couch. They looked at each other in silence. "Leya's going to be okay", Natasha says as she takes Loki's hand.
"Natasha, I almost lost her today", Loki says. "And I almost lost you too". Natasha stayed quiet. The Avengers left the room, leaving Loki and Natasha by themselves.
"I'm not going anywhere, Loki. And neither is Leya", says Natasha.
"I know that now is not the best time, but...", Loki gets up from the couch. He stands in front of Natasha. Then, drops on one knee. "Will you, Natasha Romanoff, be my wife?" Loki asks.
Natasha looks at him in shock. "Y-Yes. Yes!" Natasha says. Loki stands up and they kiss each other.
They hear clapping. Natasha and Loki looked towards the doorway and saw everyone except Tony, Thor and Leya at the doorway. They both smiled.