Imagine you're her husband. You come home from a long tour of duty, exhausted from killing all those terrorists. You don't expect a hero's welcome, but you do expect a decent home and loving wife to come back to. After all, you put your ass on the line over there, so you deserve at least that much, right?
When you log into her computer to check your email that first day back, you find a twitter tab open. Curious, you click on it, and what do you see but your wife dressed up like x-rated versions of the cartoons your kid watches. What's more, she's posing next to drawings of underage girls for some creep in her mentions, who's very clearly a pedophile, and fucking flirting with him too. Horrified, you attempt to parse it all. Did I watch my buddies die face down in the muck for this?
You confront her and she feeds you some shit about how she's just having fun, this is her choice, you're such a prude, DON'T JUDGE, etc. and you owe it to her since you were gone so long. Realizing you can't possibly leave your son alone with this person, you accept your new life like the poor, desperate motherfucker you are.
(This is of course assuming he isn't an awful piece of shit like her, which is entirely possible. The future of white america, folks.)