Do not jump the gun.
I've seen about 10-12 variations of how innocent situations - such as this may very well be - get turned into complete mayhem in a split second. And I'm positive that there exists about 50 more.
For every act, there can be a myriad of motivations. Multiply that by the number of interpretations of both the act and the motivation behind it then multiply that by the number of people involved, and well.... I'd lay back and do some serious number crunching before I made a move.
Here's one scenario: Wife doesn't like husband spending any time whatsoever with his friend. Tells husband that the friend is hitting on her. Problem solved.