'Mob Wives' Star Renee Graziano Spends Time in Prison ... to Visit Mobster Dad

"Mob Wives" star Renee Graziano made nice with her mafioso father -- Anthony Graziano of the Bonanno crime family -- and finally chose to visit him in the slammer for the first time in seven months ... TMZ has learned.

Sources close to Renee tell TMZ she and her 18-year-old son AJ hit up the Metropolitan Detention Center in Brooklyn last week to visit her consigliere father. Graziano is serving time for extortion and racketeering charges because Renee's ex-hubby ratted him out.

According to our sources, Renee felt embarrassed by her ex's betrayal and that's why she went so long without seeing her dad.

The three spent a little less than an hour at the prison catching up and we're told Papa Graziano was especially happy to see his grandson.