Try this quote from the same story. There are a couple of clues in it:
Quote
Her voice trailed off when his hand slipped into her hair
and his mouth sought out hers. She moaned softly, shifting
on his leg to press her body more firmly against his. It
was only a moment before he had his arm under her legs and
was standing up to carry her to the back of the RV. He laid
her on the bed, before standing up again to look at her,
lying there waiting for him. He kicked off his shoes and
was about to crawl on the bed to join her when he felt
something grabbing at the bottom of his pant leg.

He glanced down in confusion.

"Cookie!" Lois exclaimed when she saw the dog had seized
onto the edge of Clark's jeans and was currently trying to
drag Clark away from the bed. Clark shook his foot, but the
dog maintained its grip, swinging slightly with the
movement.