Viper is good theory..and meshes with that scene at his house.

But same thing: how would Wolf have Viper's phone #?

McGillis had to secretly give her number to Maverick for the date, so it wasn't like her # was public info for Wolf.

Viper's wife's empathy for Maverick: if that was supposed to be the emotion on her face, she fumbled that one completely.. that was more like a "i can't believe they found child pornography in your house..let me keep the kids away from you"-look