Teresa Giudice Not Worried About Marriage Despite Explosive 'RHONJ' Trailer

Teresa Giudice's marriage to Luis Ruelas is doing just fine -- this despite the fact that a new trailer for an upcoming season of her show suggests otherwise ... TMZ has learned.

A source close to the couple tells TMZ that fans of 'Real Housewives of New Jersey' shouldn't be concerned for Tre and Louie -- as they've never been better as a couple. In fact ... we're told fans should be praying for the other ladies on the show -- hinting at serious drama to come (for them).

There's no shortage of intrigue in what Bravo teased in the trailer for Season 14 of 'RHONJ.' Like in previous seasons, Teresa's personal life is at the center of the new footage ... with costar Danielle Cabral alleging that the longtime reality star is "distraught" amid supposed trouble at home.

While the sneak peek does not get into many specifics -- they want you to watch, after all -- they do show a glimpse of Teresa and Louie bickering at one point. Another costar, Margaret Josephs, claims in a phone call that Louie has "pissed [Teresa's] money away."

Of course, we can't speak to the validity of this claim ... we reached out to Teresa’s attorney, James Leonard, but no word back just yet.

Still, this topic is likely a sensitive subject for Teresa. Remember, she served 11 months behind bars after pleading guilty to fraud charges back in 2014.

Her ex-husband, Joe Giudice, also pled guilty to the charges and served three years in prison before being released ... and subsequently deported. Since leaving Joe -- she's moved on and married Louie ... and on the surface, there's been no signs of trouble between 'em.