Justifying dual standards with questionable evolutionary psychology, frankly, is just not convincing.
If I found my wife flirting with other men online, be it via a "fake" service - whatever that may mean, its a serious violation of my trust and damages our relationship on a significant level. I don't care what hamfisted biological theories you toss out, its hurtful and disloyal. We're not all Sheldon Cooper.
>adventures to provide for their tribes.
I don't live in a tribal society and I suspect neither do you. I can't have 10 wives or 20 mistresses nor challenge people to honor duels. In fact, the state demands I'm non-violent, have only one wife, and society puts a great deal of pressure on us to stay monogamous. We have next to nothing in common with cavemen and the tribes of old.
I live in a modern society and play by its rules, that includes taking monogamy seriously in my marriage. My wife doesn't get the luxury of being immune from this because she's a woman and my feelings towards monogamy aren't invalidated because I'm a man.