Usually Fred would notice when someone else came in. Especially if that someone was Sasha. But at the moment, she was so absorbed in what she was doing, that Nick Fury himself could enter, and she wouldn't notice.
Fred continued with her routine until the music stopped, standing when it was done. She noticed her girlfriend sitting in the corner, and smiled.
"See anything you like?" That smile turned into a cheeky smirk. Fred did those around Sasha a lot.