Two couples within the team had sex throughout the night. Driola was the only one who didn't have such 'obligations', because she was alone. Now one would consider her condition as sad, since there were couples all around her, but she wasn't a woman who pursued love actively.
Bardeelus was her main interest, but at most times, she only followed him along on the count of his pure blood. She wanted her kids to have a chunk of his pure heritage, and therefore protected Bardeelus dearly as much as she could, but other than that she was fine. She didn't feel alone, and she didn't have any major interest towards anyone.
Fenik had tried to sleaze his way into her underwear, ever since he had seen Driola, but she constantly refused him. She was smart enough to be disgusted by most people, and barely liked people that were compatible with her to begin with. She rejected Fenik, the former coward, at an astronomical scale!