As he found himself becoming more comfortable she stiffened. Her eyes flickering closed. Breath hitching. Her nervousness only increasing as he rested on her. When he was comfortable he said a soft thanks. It was nice to know that at least he appreciated it.  After a few moments of this closeness her body loosened from its stiffness. Still wary of him she found him less likely to get rid of her, as his source of heat. 

The howl of the wind outside the cave brought her attention back to the situation. Her eyes drifting to his wings. Her warm glow revealing a pattern across them. Pale, purple spirals that caught her eye. Like the gems in the cave she was attracted to it. 

Her hand lifted slightly towards his wing before it dropped next to her again. Figuring better of it as his stomach groaned, asking food food. She hoped he wasn't planning on using her to fulfill that purpose.
' neutral benefits could be sharing food, and you sharing this warmth when necessary.' He said as soft as a whisper. His vpice smooth, as if unaffected by the crisp air and howling wind. 

She took it in. They both weren't in the best shape. Her could gather food more easily and warmth was easy to procure for her. It seemed like an even trade. Though how to respond now questioned her mind. Her gase wanding from the tail on her lap. Which coiled there as he was speakin. Up his body, which was  right next to her. Right back to his wings were her gase wandered to the gems in the sharp walls of the cave. 

Respondin to his proposal  Delsa decided on answer. " That sounds good enough for me." She said. Again her voice almost enchanting; if not for the tone of feer and uncertainy lacing every word she uttered. His presence next to her fueling that. Her body fatiguing again from producing heat, she left a yawn to excape her lips. Her body clearing showing the signs of fatige. Her head slowly leaning towards him.