Thank you for your reply, but when he is at work I think he calls her everyday. I do not want to tell him not to talk to her, becuase that isn't the issue. It's how they talk to each other and that. I honestly do not want to step over my boundaries and hurt anyone here.
I just wish that there was a way that I make him realize that she is an adult and can take care of herself and that he shouldn't be so concerned of her.