Sean Combs' former assistant "Mia" delivered some of the trial's most harrowing testimony yet on Thursday, delivered in hushed tones and with stilted speech, and she is expected to be on the witness stand all day Friday.

"Mia" testified that working for Combs was "chaotic," "toxic" and dependent on his whim.

"He can ask you to do 17,000 things at one time," "Mia" told the court. "Cracking his knuckles, to writing his next movie, to doing his taxes. He can also just have you standing next to him for 22 hours" doing nothing.

"Mia" testified that she feared she "couldn't tell him no," so when she alleges Combs climbed on top of her and sexually assaulted her in a bunkbed in his house, she told the court, "I just froze."

Combs denies sexually assaulting anyone, but "Mia" testified that it happened more than once, leaving her feeling "terrified and confused and ashamed and scared."

Combs is not charged with sexual assault but "Mia's" allegations are part of the forced labor element of racketeering conspiracy charge he faces, which he has denied.

In hushed tones, with her head down and through frequent sobs and tears, "Mia" testified that Sean Combs allegedly raped her inside his home on Beverly Grove Drive in Los Angeles.

According to her testimony, she was asleep in her room on the bottom bunk – she previously testified Combs did not allow her to lock her door – when she remembered waking to “the weight of a person on top of me,” allegedly Combs.

"Mia" told the court that she remembered Combs “telling me ‘shh’” and “using one hand to get his pants off.”

Haltingly, "Mia" told the court that Combs "put himself inside me.” She then broke down in sobs.

"Mia" testified, “I just froze. I didn’t react.”

"Mia" told the jury that she felt “terrified and confused and ashamed and scared.”

Another time, "Mia" testified, she was packing things in a bedroom closet when Combs entered.

“I looked up and he was standing right in front of my face,” "Mia" testified. Barely audible, "Mia" continued in her testimony, telling the court that Combs “had his penis out, grabbed my head and put it in there.”

Smyser asked, “Did he put his penis in your mouth?”

"Yes," "Mia" told the court.

“How did you feel?” Smyser asked.

“Like trash. Scared and ashamed," "Mia" testified.

“Did you want to give Mr. Combs oral sex?” Smyser asked.

“No," "Mia" told the court.

"Mia" took rapid breaths between words and phrases, testifying that she “always” worried about being physically hurt or having her reputation tarnished by Combs.

“I didn’t want to die or get hurt,” "Mia" testified. She told the court she also worried Combs would “fire me and twist the story into making me look like a threat.”

Asked why she did not tell Combs "no," "Mia" testified, “I couldn’t tell him no about a sandwich. I couldn’t tell him no about anything.”

"Mia" told the court that she did “absolutely not” want to be talking about the sexual assaults she alleged Sean Combs committed against her, but that “I have to tell the truth, the whole truth and nothing but the truth, and also I have a moral obligation because when you’re scared into silence, these things continue to happen to others.”

"Mia" told the court that the alleged sexual assaults by Combs were “the most traumatizing, worst thing that has ever happened to me."

Court has adjourned for the day. Testimony by "Mia" will continue Friday.

"Mia," the prosecution witness testifying under a pseudonym, testified that the first time Sean Combs allegedly sexually assaulted her was a few months into her job as his personal assistant, while they were at the Plaza Hotel in New York for his 40th birthday.

“Did you ever want to engage in sexual activity with Mr. Combs?” prosecutor Madison Smyser asked.

Looking down, "Mia" softly testified that she did not.

Combs had rented the Penthouse and asked to speak with "Mia" alone in the kitchen, she told the court.

“He was saying what a good job I was doing and that I didn’t have to be nervous or scared to come to him,” "Mia" testified. “He said he noticed I was doing a great job, sort of like, ‘We’re going to be working closer together.’”

"Mia" testified that Combs gave her two shots of alcohol. “I remember thinking, like, whoa, did I not eat or something, because they affected me, like, I felt like they hit me kinda hard,” "Mia" testified. “I was in my 20s in New York and two shots would not have made me feel that way.”

According to her testimony, "Mia" said she remembered standing against a wall.

“All of a sudden his face got closer, my eyes couldn’t focus on his face because it was so close,” "Mia" told the court. “He put his arm next to my head against the wall and leaned in to kiss me and put his other hand up the side of my dress.”

Smyser asked, “Did you want Mr. Combs to kiss you?”

"No," "Mia" testified.

“Did Mr. Combs put his hand up your dress?” the prosecutor asked.

“Yes," "Mia" told the court.

“Did you want him to do that?” Smyser asked.

“No," "Mia" testified.

That alleged incident was not the only time that Combs made an unwanted sexual advance to her, "Mia" told the court.

The prosecution witness testifying under the pseudonym "Mia" told the court that Sean Combs once threw a computer at her in his trailer while on the set of a music video in Los Angeles.

The W-iFi was not working, "Mia" told the court, and when she told Combs technicians were working on the issue, Combs allegedly interrupted her.

“He cut me off and started screaming at me that I shouldn’t come back here until I figured out the Wi-Fi myself. Something about, ‘I don’t care if you have to call Bill Gates.’ He chucked a computer at my head,” "Mia" told the court.

"Mia" further testified that at another time, in the kitchen of Combs’ house after a night at a club, Combs ordered her to “go get everybody IHOP right now.”

“We had been out since eight in the morning, like, go, go, go,” "Mia" told the court, saying that she then turned to go to her room because “I was on my period and needed to change my tampon.”

Her failure to immediately attend to the errand upset Combs, "Mia" testified.

“He was pissed,” "Mia" told the court. “Like, ‘Yo, girl I told you now. I didn’t tell you go to your room.’”

In her testimony "Mia" described “blood dripping down my leg” and Combs allegedly taking a bowl of spaghetti in his hand, telling the court that “he threw it at me aggressively and started cursing at me and told me to get the f--- out of his house.”

The next day, "Mia" testified, she was informed that she was going to be suspended without pay.

"Mia" rarely looks up during her testimony. She keeps her head down, speaking into her lap.

“Sometimes he treated me like his best friend, his working partner. Sometimes he treated me like I was a worthless piece of crap,” "Mia" testified, pausing to sip from a water bottle. “He would humiliate me. He would curse at me. He would go on really long extended rants about how incompetent and stupid I was. Threaten my job.”

"Mia" told the jury that Combs would dangle job opportunities before her or threaten to take them away, depending upon his mood.

“He would say things like, ‘One day, you can do whatever you want at any of my companies,’” "Mia" testified. Other times, she alleged, Combs would threaten to take away her television credits or to scrap projects on which she worked.

"Mia" also testified that Combs gave her drugs. On one occasion, she alleged that he gave her MDMA and told her “That I was now a part of the breakfast club,” which she testified was a “close circle of friends that partied through breakfast. It was like a cool kids club.”

"Mia" told the court that she witnessed Combs take drugs at “inappropriate” times. “One was a board meeting,” she testified, while another was at Chelsea Handler's TV talk show.

"Mia" told the court that she remembered thinking of Combs, “When was I going to have to pull him aside and tell him 'you’re a little crazy at the moment.'”

"Mia" also testified, as other witnesses have, that Combs kept drugs in a Louis Vuitton pouch, calling it “Sort of like a traveling medicine cabinet.”