Cheaters never prosper. And that adage is especially true when professional “honey trapper” Madeline Smith is the bait.

But when the vixen isn’t busy testing the loyalties of taken men at the behests of their suspicious partners, she’s sharing tips and tricks on how to spot the tell-tale signs that a guy is up to no good.

“Don’t get it twisted ladies,” wrote Los Angeles-based Smith in the caption of a trending TikTok. “There is NOTHING wrong with taking concrete steps to protect your heart.”

And, unfortunately, in today’s digital age, opportunities to cheat on a significant other are only a few clicks away.

But Smith, a siren who sends flirty messages to off-the-market men for a living, assures that curious wives and girlfriends don’t have to know computers in order to finger their guys for being unfaithful.

Instead, naughty know-it-all suggests women keep their eyes peeled for any of the following top eight red flags.

He Hides His Phone

“When you’re out for dinner, or just on the sofa watching TV, does your man leave his phone face up or face down?” Smith asked in a column for the Daily Mail. “It may seem trivial, but ask yourself – what could possibly flash up that he doesn’t want anyone to see?”

“I think it’s rubbish when people say phones should be private,” she continued. “You can be anyone you want to be online (trust me, I would know), and you should recognize that your partner may feel insecure about your online activities.”

Smith insists innocent dudes don’t hide their devices.

“If you’ve got nothing to hide, why should you care?” she wrote. “It meant a lot to me that my fiancé was comfortable sharing his passcode.”

And while a man “can’t control” whether a woman decides to message him, “he can control his reaction,” she asserted.

“Take one of my ‘failed’ experiments,” said Smith. “A client asked me to test her husband, and he politely informed me he was happily married. When I shared the happy news with her, she said he had already showed her the conversation.

“Guys, it’s that simple: transparency, always.”

You’re Not in His Pics

“With my pregnant client, it was an immediate red flag that there were no pictures of her on his Instagram profile,” Smith warned. “Even if he claims he never posts on social media, you should at least feature in his profile photo.

“Your partner should be proud to show you off,” said the sexpert. “If he’s not, it signals a lack of commitment.”

He Uses Snapchat

Smith’s skeptical of any chap using the “Chat.”

“There is no good reason why any man past school age should have Snapchat on his phone,” she wrote. “SnapChat — with the USP that it deletes messages after they’ve been viewed — is an app for cheaters.”

“I’ve only ever known adult men use it to send and receive explicit photographs,” Smith warned. “Whatever his explanation, if he’s a regular Snapper, be very wary.”

Not Showing His Location

“Nowadays, it’s normal to have your loved ones on location-sharing apps,” noted Smith. “One of the red flags I often hear is: ‘My husband’s location always seems to turn off with no explanation.’”

But the pro-pinup isn’t buying it.

“Cheaters will come up with some excuse as to why they don’t want to share their location, but then insist that their girlfriend shares theirs,” Smith groaned. “Which leads me to my next red flag…”

Unequal Expectations

“Cheaters are jealous people with fragile egos,” she asserted. “That’s almost always why they cheat: the validation of one woman’s love is never enough for them.”

Smith urges women against falling into a one-sided trap of irrational rules.

“My clients often report that their partner expects them to have unrealistic boundaries with men: cutting off male friends, even not speaking to male colleagues,” she told the Daily Mail. “Meanwhile, he’s posting pictures of himself with bikini-clad stunners who are ‘just friends’.”

He Accuses You of Cheating

“Does your partner call you ‘crazy’ or claim you’re ‘just being insecure’ if you raise concerns?” she questioned. “Does he accuse you of being unfaithful for no obvious reason?

“Not only is this gaslighting behavior designed to be humiliating,” Smith wrote, “[but] it is also highly revealing.”

Her lesson: he’s “projecting” his own cheating guilt on you.

“In a loving relationship, the response to concerns being raised should be shock and gentle affirmation,” Smith said.

“Think, ‘Oh my gosh, I would never do that to you,’” encouraged the eyeful. “Not, ‘Are you crazy? I can’t deal with your insecurity right now.’”

Intuition is Key

“Women are more emotionally intelligent than men,” Smith said. “But we’re also masters of convincing ourselves that strange behavior must have an innocent explanation — when every bone in our body is screaming otherwise.”

Rather than rationalizing a man’s weirdness, “trust your gut,” Smith asserted.

“Almost all of the messages I receive are from women saying that something just doesn’t feel right and, sadly, they’re usually right,” she revealed. “If in doubt, call him out – or engage the services of someone like me!”

Emotional Distancing

“Does your partner seem disengaged during conversations?” Smith asked. “Have his compliments stopped? Did he use to touch you a lot, and no longer does?”

If any of those questions prompt a “yes,” the human two-timing detector wants women to beware.

“This kind of emotional distancing is one of the biggest red flags.”

Delete the Cheat

Even without Smith’s help, some cyber-savvy sleuths are becoming skilled in sniffing out dogs themselves.

Abby Paige, a digital content creator, tinkered around with Wi-Fi settings to catch her mate creeping around with other women across the world wide web earlier this year.

And Liesel, a Gen Z from Missouri, learned the truth about their sweetie’s infidelity while innocently scrolling through social media.

The brunette accidentally uncovered her ex’s misdeeds after stumbling upon another woman’s “Get Ready With Me” TikTok clip.

In the video, the other gal was primping for a hot date — at Liesel’s fella’s house.