If a person is willing to lie to a partner about having an affair...and this guy is a liar by defintion...then he'll be just as quick to lie about safe sex and a lack there of. Your wife could be exposing you to a world of very real and physical danger. They both need to be a bit more adult about thier actions.
I've been in the other guys shoes...I was a liar, simple and plain. Watch out for yourself and hopefully your wife will find someone who better suits a "poly" atmosphere...the kind that involves honesty and taking other people's feelings into account.
Playing the Game of Life with Monopoly rules.
Monogamy might just be in my genes
Poly Events All Over