There ' s really no possible answer except to get a divorce and get therapy . <| sep |> If you ' re concerned about legality , having sex in public is more illegal than going into the wrong bathroom is . As best I know only transgenderedtargeted bathroom laws make this act illegal . Public sex is illegal everywhere to my knowledge and is considered a sex crime in some jurisdictions . Meaning not only the normal legal penalties for public indecency , you both could end up on the sex offender registry if you get caught . Dunno how often this happens , only that it can and has in these jurisdictions . Not saying you shouldn ' t do this , it ' s your choice , but you should know the potential legal consequences nonetheless as absurd as they are . Though I will say that clogging up a public restroom in a crowded area for sex is kinda of a dick move . don ' t judge people for breaking the law per se , but if someone really has to pee and they can ' t because of people having sex it seems pretty rude .