"I...er..."
This situation needed reassessing. Did she just pull stuff out of thin air? Is she floating? Did she teleport? Well, he saw this all with his own eyes, so he couldn't really deny this....
"... Yeah, I'll have some coffee." he answered. He might as well. However, he'd keep an eye out for her. If she could make stuff appear out of nothing, then it's possible she was dangerous. Though what could he even do? She didn't seem aggressive, so maybe he didn't have to worry.
"And why did you invite..." he glanced over to the other person and then back. "...us here?"