CSW, It's not your wife's counselor filling her head with nonsense; it's the other man.
Look, the ONLY reason I would talk with someone 7 times per day (150 times a month?!) would be if I was in love with them. Plain and simple. There is no best friend that is worth that much of my time.
Listen to NOPkins and do what he says.
Oh and keep it up with the bumps and grinds and sexy flirting. That will stick in her mind, even as she's calling OM for the umpteenth time that day. I can tell you from personal experience that I would brush my H off with derision and then spend the rest of the day thinking about his advance.
Be the man of the hour and give her something to ponder and cogitate and I'm wondering if suddenly the OM won't look so appealing.