On day five of his criminal trial, Bill Cosby's representative revealed the actor may have a change of heart and decide to take the witness stand next week.
Cosby's lawyers will present his side of the story before jurors get the case.
Cosby raised his walking stick in acknowledgment.
Constand, who is gay, says their contact was not consensual.
In the deposition, Cosby said he gave Constand three half-tablets of the cold and allergy medicine Benadryl.
Prosecutors have suggested he gave her something stronger perhaps quaaludes, which were banned in the U.S.in 1982. Cosby had been asked, according to the transcript.
The final prosecution witness, toxicologist Dr. Timothy Rohrig, testified that wooziness and other effects Constand described could have been caused by Benadryl or quaaludes.
At its base, their task is to decide if they believe Andrea Constand's accusation that the entertainer gave her pills one night in 2004 that left her essentially powerless, then sexually assaulted her. The defense had fought to keep prosecutors from using the deposition, which Cosby gave as part of Constand's civil lawsuit against him.
His deposition also showed he anxious that his career could take a financial hit if Constand's allegations became public.
"My apology [to alleged victim Andrea Constand's mother in 2005] was, 'My God, I'm in trouble with these people because this is an old man and their young daughter'".
"I apologized to this woman", Cosby said, according to the deposition.
"I'm apologizing because I'm thinking, 'This is a dirty old man with a young girl.' I said to the mother it was digital penetration".
Cosby also anxious about the repercussions from public disclosure.
"I didn't want to talk about what did you give her".
Cosby's deposition testimony was read to the jury on Friday by county Detective James Reape.
Also Thursday, a detective testified that Bruce Castor, the district attorney who decided more than a decade ago not to bring charges against Cosby, shut the investigation down in 2005 while police were still working the case.
Hoping to blunt one of Cosby's main lines of defense, prosecutors put on the stand a psychologist who testified that victims of celebrities are often afraid to come forward because of the possible backlash.
Valliere's testimony could also lend credibility to Cosby accuser Kelly Johnson's testimony, which included her admitting she was scared to speak up about Cosby's alleged assault of her since she worked at a Hollywood agency where he was the top client.
"If it's a well-known person, the victim takes on a lot of responsibility for that person's reputation, especially if that person is well-liked or beloved", Valliere testified.
O'Neill ruled the testimony permissible and rejected the request.
More than 50 women have said Cosby assaulted them, but the statute of limitations has run out in almost all cases.
This psychological analysis boosted the prosecution's case by explaining Constand's behavior and assuring the jury that alleged inconsistencies in her testimony aren't reason to discredit the entire account.
The lengthy deposition transcript, which prosecutors displayed on large courtroom screens, offers a granular look at how Cosby deals with crises. "We're weighing every option", Wyatt said.
Cosby's wife, Camille, has yet to be seen in court.
Constand had gone to police with her sex assault allegations days before the January 2005 phone conversation, but Cosby was not yet aware of that.