Guys your opinions?

An ex mistress texts a guy who has a wife. It’s been a couple of years since the mistress and guy have spoken. She ends up saying I have missed you and says she wants to see him in person. His response is we will see. She sends back I know you want to see me too but he doesn’t send anything back. The wife saw the text. Husband didn’t say anything to her. Should his wife be worried?