David had instinctively taken charge of the situation, despite his lack of experience, he still felt awkward being led around, especially with his personality. Nancy was not very comfortable in her position so she threw one of her legs across his lap.
The long dress was able to accommodate her position because of the long slit that ran through one side of her leg. Even though her position was accommodated, it came with the price of exposing a lot of skin.
When Nancy sat on David's lap, he placed both of his hands on her waist and pulled her closer to his body. Nancy's fingers tangled in David's hair as he deepened the kiss. She felt his warm tongue slip through her lips into her warm mouth.
Nancy was initially drunk but she couldn't help but think she was getting drunker by the second from how David's kisses were affecting her.