Jail time reportedly isn't stopping Teresa Giudice of Bravo's The Real Housewives of New Jersey from feuding with her brother, Joe Gorga.

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According to ExtraTV Tuesday, Giudice has been letting her brother, who's married to Giudice's co-star Melissa Gorga, know that she's livid with him. Apparently the battle continued when Joe wrote Giudice and said he was concerned that the hit series would flop with her. It looks like that's what took her to her breaking point.

"Teresa has been writing Joe Gorga letters stating how angry she is with him. She has sent about half a dozen of them," a source said.

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But word is Giudice, who is serving a 15-month sentence in Danbury, CT, was upset with her brother long before that.

"She is still angry at them because they discussed her legal problems on the show when she asked them not to. She will never forgive them for the disrespect and for letting the public know about their intimate problems."

They added that Giudice has been upset with the Gorgas ever since they even signed on to be on the show without telling her. They also tapped Kathy Wakile just one day before taping started.

"They all don't like each other. They really can't stand each other."

Interestingly enough, Melissa said recently that she has been keeping in contact with Giudce.

She told Big Morning Buzz that she hasn't been to visit her but she's emailed Giudice. She also confirmed that Giudice and Melissa stay in touch. She is set to be released Feb. 5, 2016.

Giudice is currently serving time after pleading guilty to fraud charges. Her husband Joe took the same deal and was sentenced to three-and-a-half years. He's slated to start his sentence when Teresa is released. The two have four daughters together. The oldest is 14.