She sneaks out because when you're an Avenger-in-training ( yep, just set the timeline ), and your multiple dad-like-figures want to keep an eye on you, you've gotta get your kicks somewhere.

Pushing the sleeves up on her black leather jacket she raises an eyebrow when he comes into view. There are no expectations for tonight other than, well. Dancing, but she can't help but appreciate what she sees. "Hello."