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Long story short have some good married friends who are friends with their direct married neighbors. Upper middle class people.

The neighbors wife has flirted with me, acted jealous when I dated another woman briefly, sends me photos of her "hanging out alone" on her couch, sends photos "hanging out" with men that are not her husband to seemingly make me jealous or to hint to me she's a cheat.

She revved up her game the other night and called me at 11pm to ask me to come hang out while her husband was out of town with their son, I declined.

Without any direct proof of cheating how would you approach this with this other man. Dudes a country boy, real simple minded, his wife is college educated and makes more than him. I want to just tell the man to keep his wife on a leash but I do not want to create any neighborhood drama for my friends.

Ignoring the problem is not entirely possible as any time I go to the friends house for a get together the horny neighbor woman runs over to hang out as well.