It's only been two months since Tamra Barney celebrated her daughter Sidney's high school graduation, but now The Real Housewives of Orange County star is taking some heat from the 18-year-old. In a lengthy Facebook post Monday evening, Sidney slammed the reality show — of which her mother has been a part of since 2007 — and set the record straight on their relationship. Hint: It's not good.

"I want to start by clearing some things up as my mother continues to talk about me despite me requesting her to stop speaking of me publically as I don’t want to be associated with her or the show," she began. "For starters, I did not move out when my parents got a divorce nor did I chose my father's side in the divorce. My parents separated in 2010. I moved out of my mother’s house in 2013. Me leaving has nothing to do with the divorce, it has to do with the living conditions at my mother's house and the way she treated me and still treats me today."

MORE: Brielle Biermann Says She "Wants to Join the Cast" of 'The Real Housewives of Atlanta' (EXCLUSIVE)

MORE: Shannon Beador Flaunts 15-Pound Weight Loss

During the RHOC Season 10 reunion, Tamra admitted that she hadn’t seen Sidney in two years and that her daughter had been living with ex-husband Simon Barney, from whom she had a difficult divorce. At the time, she said, "People tell you all the time, 'Don’t worry. She’ll be back. She’ll figure it out,'" Tamra said of her relationship with Sidney. "Every time someone tells me that, I want to punch them in the throat and say, 'Don’t worry. It won’t hurt long.' And then I gotta punch them again." In Sidney's post, however, she revealed that she chose to leave because it was a "toxic environment" and her mother was "the true parent alienator."

She also added that the photo of Tamra at her graduation was never supposed to be posted. "All I asked was that she remains cordial with my father and my stepmom and to not post anything about my graduation, anywhere. Not even two weeks after I graduated, she posted a photo of me and shared it with her one million followers knowing that it would get picked up by the press."

https://www.instagram.com/p/BVVRir9le66/

Only $12! — (And No One Will Know They Aren’t Designer)

Deal of the Day

Only $12! — (And No One Will Know They Aren’t Designer) View Deal

Sidney concluded with scathing remarks and said she wanted to "set the record straight" so that "she [Tamra] is held accountable and is forced to do the right thing." She added, "My mom has been portraying the innocent erased mother whose daughter was estranged from her due to divorce and an evil ex-husband when in actuality she is the sole reason why I do not want her in my life and will not have a relationship with her… However, the character keeps her relevant and is her only storyline. Why would she actually try to get me back? Without the estrangements she is no longer pitied and talked about and her fame and fortune go down the tubes."

Since the accusations, Tamra has spoken out. She captioned one of her now-deleted Instagram posts, "I want to say thank you to everyone that has reached out to me to see if I'm okay. I/We are trying our best to enjoy our vacation. Thank you to my Mom who is not taking this very well and feels the need to defend me. I love you Mom," she continued. "I love my daughter and I would NEVER abuse, hurt, or neglect her in any way. I ask that you do not send Sidney negative messages or comments; direct them at me if feel the need. Thank you for all your love and support #godhasthisinhishands."

In a separate post, the RHOC star — who just renewed her vows to Eddie Judge — wrote, "Celebrating love with all the hate that's going on." Here's to hoping these two can eventually work things out!

Have a tip? Send it to us! Email In Touch at contact@intouchweekly.com.