Text OM, tell him outright you do NOT want him to talk at ALL with your wife.. hes not a family therapist and is NOT qualified to advise her... tell him to go HOME and work on his probelms at HOME... stop wasting time with your wife... He's trashing his marriage when he talks to your wife.
Tell him to go HOMe and NEVER talk to your wife again.
Call your buddy at work, update him and make sure he keeps a CLOSE EYE on both of them and keeps you in the loop.
Send him a gift as well... he's going to save your marriage.