She testified she felt frozen and wasn't able to fight in any way - but she wanted it to stop.
Pulliam, who played Rudy Huxtable in the iconic series The Cosby Show from 1984 to 1992, entered the Montgomery County Courthouse arm in arm with the 78-year-old comedian on Monday.
She said that she had gone to Mr Cosby's house for dinner when he offered her three blue pills which he said were her "friends" and would help her to relax. They also indicated that she called lawyers specializing in civil litigation before reporting the alleged assault to police.
Constand also reportedly said Cosby had made advances at her in the past, having put a hand on her thigh and, on another occasion, tried to undress her before withdrawing when she said "I'm not here for that". It's unsure what exactly Constand will say when she takes the stand, but chances are she will be thoroughly questioned about her experiences of the night of the incident, as well as how she handled it afterward.
Before Tuesday, Constand had never spoken about Cosby in public, barred from doing so under the terms of a confidential settlement they reached in 2006.
Constand is one of around 60 women who have accused Cosby of sexually violating them but the prosecution has gone ahead on just Constand's allegations due to the statute of limitations passing for almost every other of those claims.
Patricia Sewell said during the second day of Mr Cosby's sex assault trial for a separate case that her daughter "changed considerably".
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Prosecutors on Monday opened the trial with a woman who broke down in tears as she testified that the comedian had violated her, eight years earlier, at a hotel bungalow in Los Angeles. "And I believed he supported numerous athletic programs", Constand said. Only in Constand's case has Cosby been charged.
Constand isn't his only alleged victim on the stand. If the jury believes her, Cosby may be cooked. As day two of the Cosby case comes to a close, here's a recap of what's happened so far.
Instead of telling her, she said he responded, "I thought you had an orgasm, didn't you?"
Bill Cosby's lawyers are seizing on inconsistencies in his chief accuser's recollections of their relationship and the night she says he drugged and violated her more than a decade ago at his suburban Philadelphia home. After briefly losing consciousness, she came round as Cosby was touching her private parts, she testified. Johnson said she had waited years to accuse Cosby.
After Constand began "seeing double", she realized that her legs were weak, at which point she alleges that Cosby led her to a couch, where she "passed out".
Cosby denies the charges against him.
She returned the next evening and asked what the pills had been but did not get an answer. Johnson gave the deposition while pursuing a claim that she'd developed debilitating stress from her job as a secretary at the talent agency representing Cosby.
"Her father didn't want her to be humiliated and feel shame and embarrassment as he had seen other women go through when they went to the police at that time".