McMansion Hell is a Tumblr blog that highlights the absurdity of giant real estate properties and the ridiculous staging and photography that are omnipresent in their sales listings. The blog, started by 23-year-old Johns Hopkins graduate student Kate Wagner, began in July 2016 as a way to poke fun at pretentious architecture. It has since gone viral, but now she’s facing potential legal charges by real estate site Zillow for allegedly violating the site’s terms of service by reproducing the images on her blog.

A typical McMansion Hell blog post will have a professional photo of a home and / or its interior, along with captions scattered throughout by Wagner. She also adds information about the history and characteristics of various architecture styles, and uses photos from the likes of Zillow and Redfin to illustrate how so many real estate listings inaccurately use the terms.

McMansion Hell may “[interfere] with Zillow’s business expectations”

Under each post, Wagner adds a disclaimer that credits the original source of the images and cites Fair Use for the parody, which allows for use of copyrighted material for “criticism, comment, news reporting, teaching, scholarship, and research.” In a cease and desist letter to Wagner, Zillow claims Wagner’s reproduction of these images do not apply under the Copyright Act. Additionally, the company claims McMansion Hell may “[interfere] with Zillow’s business expectations and interests.”

Somebody help me, Zillow is threatening to sue me pic.twitter.com/mEiQ7ddiqS — bad house tweeter (@mcmansionhell) June 26, 2017

“I've never received any warning from them before this,” Wagner tells The Verge. “This blog is my entire livelihood and I am at risk of losing everything.” Wagner currently monetizes from McMansion Hell by selling merchandise with original artwork referencing the blog and accepting Patreon donations. She is also working to turn the blog into an e-book, where she had planned to pay to license photographs used in the project.

At time of publish, Wagner has temporarily taken McMansionHell.com down. Somewhat ironically, Zillow was just involved in its own legal battle over copyrighted content, where the real estate site was found guilty of copyright infringement on more than 28,000 photos and ordered to pay about $4.1 million in total damages.

“Zillow has a legal obligation to honor the agreements we make with our listing providers about how photos can be used,” Zillow tells The Verge in a statement. “We are asking this blogger to take down the photos that are protected by copyright rules, but we did not demand she shut down her blog and hope she can find a way to continue her work.”

Update June 26th, 5:13PM ET: This post has been updated with a statement from Zillow.