Teresa Giudice has taken to Instagram to defend the honor of her boyfriend.

While simultaneously insulting his health and/or physique.

Allow us to explain...

As you likely know by now, Teresa has grown very serious over a pretty short period of time with Luis Ruelas.

The Real Housewives of New Jerey star and her lover went Instagram official just before Christmas and haven't looked back since.

They share photos of each other on social media, they gush over each other on Instagram -- oh, and they recently bought a mansion together and may soon get engaged.

That is, unless Giudice discovers that Ruelas has been cheating on her.

Last week, Teresa was forced to confront this possibility when a hater wrote the following in the Comments section of an image Teresa shared of her and Luis:

“Heard he is flirting with girls in the gym."

Giudice, however, didn't take the bait, clapping immediately back at this troll by replying:

“Good for him [too] bad he does not go to the gym."

The cheating allegation comes on the heels of Giudice lobbing the same sort of allegation in the direction of Jackie Goldschneider.

The two have clashed often on early episodes of The Real Housewives of New Jersey Season 11 because Teresa strongly implied to Jackie that her husband, Evan, has been having an affair.

With, you guessed it, a woman at his gym.

So the above exchange was likely started with a view just having a bit of fun at Teresa's expense.

Giudice, meanwhile, may not have anything to worry about in her personal life -- but what about her professional life?

There's been chatter that she made up the Jackie/Evan/infidelity rumor because she's desperate to remain relevant, and therefore employed.

“She’s being watched by the network and needed a story to stir the pot," alleges an Insider to Page Six.

"She had zero proof [that he cheated] and made up the story because Bravo has been getting rid of original Housewives."

Concluded this report:

"[She’s] too expensive and they can filter through different women. She’s desperately trying to stay relevant.”

This may also explain how fast Teresa is moving with Luis.

What better way to stick around in the news, and to provide the program with a new storyline, than by getting engaged?