River could definitely help in that department. He reached down while he kissed her, his hand running down her leg as he helped her get her panties off, and then back up her leg, taking the time to lightly touch the side of her ass before going back to her sides. But they didn't stay there long, because he had underwear to work on removing himself.
He worked his boxers off, never parting from her lips, and threw them to the floor. His hand followed the same path as earlier, but this time, it went a little higher, cupping her breast as he moved on leg to the side with his own.