Try

She blinked a few times, then rubbed her eyes like crazy, trying to make sure it wasn't a dream, an imagination, or some kind of hallucination. Or maybe she was going crazy from being alone in that giant mansion?

But after so many rubs, Mason was still there, sitting comfortably on the couch. He was real.

Mason noticed her standing there and turned his head slightly. "What are you doing just standing there and staring at me? It's creeping me out."

Ellen blinked, snapping out of her daze. She walked slowly toward him, her footsteps soft on the carpet. "What are you doing here?" she asked, her voice filled with genuine curiosity.

Mason raised an eyebrow. "Am I not allowed to be in my own home?"

Ellen shook her head quickly. "No, I mean, you're never home at this hour. You usually come back late."