Martha Stewart was placed in solitary confinement without food or water

Martha Stewart's stay in federal prison was no picnic.

The lifestyle mogul spent five months at Alderson Federal Prison Camp in West Virginia (nicknamed Camp Cupcake) after she was found guilty of, among other things, conspiracy and obstruction of justice in connection with the sale of a stock. The new Netflix documentary Martha (from Oct. 30) looks back on her “terrible” time there.

Stewart, 83, provided filmmaker RJ Cutler with personal letters she had written throughout her life, some of them from behind bars. A voiceover reads the letters Martha.

On the first of 150 days in prison, Stewart writes: “Physical exam, stripped of all clothing. Squat down, stretch out your arms, cough – embarrassing.”

Stewart is also interviewed in the documentary. “I had to do all the crap you see in the movies. You can’t even believe you’re going through this,” she said.

The letters reveal an altercation with two prison guards that got Stewart into trouble.

“Today I saw two very well dressed ladies walking and I scurried past them noticing the lovely warm morning and how beautiful they looked. When I recognized that they were guards from the large silver key chain, I lightly stroked the chain,” she wrote. “I was later called in to be told that I must never touch a security guard without expecting a stern reprimand.”

Stewart remembers apologizing, but because “the incident was so minor at the time it occurred,” she put it aside — until her punishment came.

“I was dragged into solitary confinement because I touched a police officer,” Stewart said on camera. “No food or water for a day. That was Camp Cupcake, remember? That was the nickname. Camp Cupcake. It wasn’t a cupcake.”

A representative for the federal Bureau of Prisons declined to comment on the 2004 allegations, but said the bureau “incarcerates offenders in safe and humane facilities.”

“Every individual is provided with the basic needs of life, including regular meals three times a day and access to drinking water, regardless of where they are housed,” they added in a statement.

In MarthaStewart describes her cell in prison. “There is an old double decker bed frame in my room with a metal spring and metal frame,” she wrote. “The springs are very saggy and therefore an unhealthy bed set. I would actually prefer the upper bunk, but if you’re over 62 you automatically get a lower bunk.”

The first female billionaire in the United States remembers waking up at 4 a.m. to start her daily routine.

“What concerns me is the very poor quality of food and the unavailability of fresh food because it contains a lot of starchy foods and a lot of carbohydrates and a lot of fatty foods. There is nothing pure,” she wrote.

“Everything was terrible,” Stewart adds.

Martha follows her release from prison (in her famous handmade poncho) and her ultimate comeback.

“I just hope that everyone learns some life lessons from the movie tonight and understands what’s going on,” she told PEOPLE at the Oct. 21 premiere.

Martha Streams on Netflix on October 30th.