Teresa Giudice has presented a united front with her husband, Joe, since their bankruptcy sentencing last week. But rumor has it that behind the scenes their marriage isn't so rock-solid. Ahead of Teresa Giudice’s 15-month federal prison sentence, set to begin Jan. 5, the “Real Housewives of New Jersey” star is reportedly feuding with her mate over money issues (they currently owe roughly $400,000 in restitution) and their differences of opinion about rearing their four daughters.

While the couple isn't likely headed for a divorce, insiders close to the Bravo network stars say their 13-year marriage is no fairy tale. “It’s all a sham,” a source told Radar Online Wednesday. “Behind closed doors, when there are no cameras around, Teresa’s claws come out.”

Despite the court allowing Joe Giudice, 43, to begin his 41-month sentence after his wife’s term is completed, the reality-TV mom is reportedly unconvinced that he can properly care for their four children -- Gia, 13; Gabriella, 10; Milania, 8; and Audriana, 5 -- while she's gone.

“The couple has been fighting non-stop about Joe taking care of their kids when Teresa is in prison,” according to a source who claimed that Teresa Giudice, 42, is hoping her parents, Antonia and Giacinto Gorga, will care for the girls while she's away. “She has absolutely no faith in Joe’s abilities to be the kid’s sole caregiver,” added the insider.

Teresa Giudice’s inability to hawk her best-selling cookbooks and Fabellini alcohol brand while serving time in prison has also become a source of contention for the pair. “Joe is stressing Teresa about finances as she has been the breadwinner for the family in recent years,” a source said. “She needs to cash in wherever she can because once Teresa goes to prison, the money will stop coming in.”  

Last Thursday, the couple appeared in front of a judge in Newark, New Jersey, where they pleaded guilty to four counts of fraud after being indicted on 41 charges in March. On Monday, they spoke about their marriage and looming jail sentences with Andy Cohen on Bravo’s “Watch What Happens Live.” The second half of their interview, which is rumored to have fetched them a cool $325,000, according to TMZ, will air on Bravo this Thursday, Oct. 9, at 9 p.m. EDT.

Contradictory to Radar Online’s report, Teresa Giudice says she and her husband are still close after their legal battle in a sneak peek of the interview released by Us Weekly on Thursday. “I think it’s a learning lesson for the both of us,” she said. “Since [the sentencing], he’s been feeling bad and keeps coming up to me and hugging me.”

Catch up with all of the Giudices' legal drama on “The Real Housewives of New Jersey” Sundays at 8 p.m. EDT on Bravo.