Ruby understood nightmares and she gave Cassie a sympathetic look as she stood, offering her hand to help the other girl up. "Where are you staying?" she asked. "I mean, if you don't want to stay alone to try and keep the nightmares at bay, you're welcome to crash with me." It wasn't a surefire way to keep them from happening, but in Ruby's experience, not sleeping alone made it less likely for her to have nightmares.
The offer was made innocently. Despite her earlier flirtation, Ruby was able to sense that Cassie wasn't ready to make that kind of connection here and she wasn't the type who was going to push at all. "I promise I'll put on clothes," she added lightly. "It's... kind of a long story why I'm out here like this." She didn't know if Cassie was aware of the existence of werewolves or what her thoughts might be about them, but it was too late to get into that particular conversation at this point.
Either way, she started walking back towards the main camp area. Her own shelter was a bit outside of the main area, as most people were setting their own up, but it made sense to at least head in that general direction.