read somebody's mind
read somebody's thoughts

Before she could say anything else, however, he had read her mind.

Even without reading his mind, she knew what he was thinking.

The man was very nearly able to read her mind.

We couldn't have read his mind and known what he would do.

She was trying not to think about his reading her mind.

He looked at me, and I tried to read his mind.

Data asked once again, almost as though he could read her mind.

Just how much have you been reading my mind of late?

I don't have to read your mind to feel that much.

Perhaps they could read his mind, but weren't doing it at the moment.