Who is the big spoon/little spoon?

Becky rolled over, the sheets twisting around her ankles. She didn't know when they had fallen off but it was too warm to pull them back up. She smiled to herself, the suns rays hitting her face through the gauzy curtains. Thin arms wrapped around her mid-section. She felt Garth snuggle up to her back, warm against her semi-naked skin.

She was content.