Good-day everyone!
Today's phrase is "read someone's mind."
This means that you know what someone is thinking (usually because you know the person well).
Example 1
A. Your father is thinking about work.
B. How do you know?
A. After 35 years of marriage, I can read his mind .
Example 2
I didn't tell her that I was unhappy. She just knew. She must have read my mind.
Example 3
I'm sorry, but I can't read your mind. Where do you want to go for dinner?
https://idioms.thefreedictionary.com/Read+My+Mind