Thanks to her Red Room training and her years of experience with SHIELD, Natasha was pretty used to rolling with the punches and adapting to any situation. Ending up in an alternate dimension courtesy of a magical tree stump was a bit more fantastical than anything else she had experienced, but there was no reason to panic. The best thing she could do was gather as much intel as possible and figure out a way back home.
Discovering that Steve was there was a relief. There were very few people she trusted implicitly and he was one of them. That became even more important when she found out that this Daisy girl was claiming to be a SHIELD agent. Natasha was well aware of Fury's history as a lying liar who lied and she wasn't going to completely dismiss the notion that a small cell of SHIELD was somehow still operational, but she also needed to confirm that this whole thing wasn't some sort of HYDRA set up.
Knowing Steve was lurking somewhere nearby as backup, she entered the coffee shop and headed straight for the counter to order a plain black coffee. Cup in hand, she joined the young woman at her table, giving a silent, expectant look.