I think that's what it boils down to...if your wife is OK with you having dinner & drinks alone with female friend, and if you're OK with it, then that's where your combined lines of appropriate behavior are. That's not where mine are, but again, I'm not telling anyone how to live their life, that's just how I choose to roll. Everyone's relationship is different, that's all. I am overly cautious, personally. Probably because I'm borderline irresistible to women, what with my ability to cook, 4-cylinder sports car, and rockin' dadbod 😀