Of course it is

Angels were extremely exotic creatures. Even more rare then dragons. You were most likely the only person who has one at her leisure. Of course you should spend as much time with her as possible.

When you entered the cell you were holding her in, you saw she was seated cross-legged on the bed.
You were kind enough to allow her to have a table, a chair and a bed. The most necessary things you could imagine any humanoid creature would require. At least the bed was being used, you still had your doubts about the table.
When you saw her you could only marvel at her beauty. Her hair shone like it was made of white gold. Her white robes, stripped of any metallic armor from the battle, accentuated her curves, especially her luscious breasts. Her wings, dear god, her huge white wings could reach both sides of the room if she spread them all the way. You were already getting an erection just looking at this perfect creature.

“Why did you come here?” She asked you.
You shrugged. “Can’t I take a look at my prize?”
“I am not a trophy.” The angel replied.
“Yeah, here’s the thing.” You explained to her. “You lost so you don’t get to decide.”
The angel didn’t listen to you.
“My name is Doe.” She explained. “I am a person and I deserve to be treated with respect.”
You ran your fingers across her beautiful white wings.
“You are under the effects of a dark-magic field, which strips you of your divine strengths.”
Then you take hold of a single feather, and pull it out. Doe winced.
“Which means, I can do whatever I want, and you can’t stop me from doing so.”
Doe frowned. She didn’t like it, but knew she knew it was true.

You placed the feather between Doe’s breasts and stroked it down her cleavage. She quickly grabbed you by the wrist and said “Don’t do that.”
How dare this angel tell you what to do. You were her conqueror, and as the victor you were entitled to your spoils. Perhaps you should put her on her place. Then again, maybe it would be better to convince her instead.