Lucy would swat him if he did try to start anything else - unless the anything else was just holding her in his nice, strong, warm arms. "Hmmm, why not both?" she asked, "It'll be more comfortable for the both of us in bed, and I'll be able to snuggle into your arms at the same time." She wanted to stay nice and close to him before they drifted off to sleep. "But you'll have to carry me," she added, a little sheepishly, "I don't think I'd be able to make it." They got -quite- rough with each other.

.... but more likely she just wanted to be greedy for more closeness with him, which was easier to carry out if he was holding her, fufufu.