AceShowbiz - Stephanie Pratt has had enough. "The Hills: New Beginnings" star took to her Instagram account to share a lengthy rants in which she blasted her sister-in-law Heidi Montag in addition to reigniting feud regarding the false rumor about Lauren Conrad and Jason Wahler's sex tape, which was said to be leaked by her brother Spencer Pratt.

"I'm drained from this year. So happy to be back home in London, where evil siblings don't exist... but instead the MOST lovely people in the world- you guys are my family these days," she wrote in her Tuesday, July 23 post. "I am so grateful, it makes my heart hurt. Thank you for making me feel like I belong somewhere (Spencer often screamed that everyone hates me, is fake nice to me and to go back to London because no one wants me here)."

She then took a jab at Heidi, whom she called "evil," adding, "you had no choice to admit all of the lies you've been spewing about me was for a magazine cover." Appearing to be referring to the whole sex tape scandal involving Lauren and Jason, Stephanie went on writing, "for real WE ALL KNOW WHAT YOU DID 10 years ago."

She continued, "You awful human being- and to your BEST FRIEND? You are truly a hideous person. No wonder you don't have 1 friend (your nanny doesn't count- you pay her)."

Back in 2009, Lauren shut down the sex tape rumors during her appearance at the Paley Fest. She told fans that Spencer came clean to her, telling her that she was the one who leaked it to the media. "We actually have it on tape. [Spencer] takes responsibility and apologizes for it. Sorry! Spoiler!" Lauren said at the time. However, Stephanie seemed to be suggesting on her new post that it was Heidi's doing instead of Spencer's.

Stephanie also addressed her feud with Audrina Patridge over triangle romance with Justin Bobby. "@justinbobbybrescia you were my rock the entire series- I love you & thank you. PS: spoiler alert... we NEVER hooked up," she wrote. "Audrina is crazy like you dated this guy ten years ago... you married someone else & have a child with him! And-As if you liked Justin!! you were dating someone off camera!! (the guy u went on a blind date with the night after the festival)! No one plays a better victim than you."

"Truth: I did not watch last nights episode Bc I didn't want to re-live my 'friend' attacking my character & making up lies about me when I have ALWAYS been a good friend to you," she added. "(You should watch the original Hills for a memory refresher) I am still utterly shocked & hurt you did this to me for camera time."

Premiering on June 24, "The Hills: New Beginnings" was recently renewed for a second season. Also starring Brody Jenner, Frankie Delgado and Whitney Port, "The Hills: New Beginnings" airs on Mondays at 10 P.M. on MTV.