Los Angeles, California (CNN) -- A key witness in the Anna Nicole Smith drug trial denied Wednesday that she was coached by the prosecutor on testimony the defense argued is false. 

The judge is considering striking the testimony of one of Smith's former nannies after a defense lawyer accused the prosecution of "suborning perjury" -- coaching the witness to lie. 

The judge also released dozens of personal photos of the actress with her infant daughter, Dannielynn, and boyfriend-lawyer Howard K. Stern. The defense showed the pictures to jurors to counter the argument that Smith was drugged during much of her last months. 

Stern and Drs. Khristine Eroshevich and Sandeep Kapoor are on trial for allegedly conspiring to provide drugs to an addict and using false names on prescriptions for Smith. 

The trial, in its seventh week, took a dramatic turn Wednesday when defense attorney Steve Sadow accused prosecutor Renee Rose of knowingly having Nadine Alexie, a former Smith nanny, lie on the stand. 

"The people (prosecution) know this is fraudulent," Sadow said at the end of the direct testimony of Alexie. 

If Judge Robert Perry accepts a defense motion to strike the entire testimony of the nanny, it would be a major blow to an already staggered prosecution case. 

"I am thinking about it," Judge Perry said. 

He already ordered the jury to ignore a portion of the testimony of Alexie's sister-in-law, Quethelie Alexis, because he found it unreliable. 

Alexie and Alexis were supposed to be star witnesses for the prosecution. They both worked for Smith in the Bahamas for several months after the birth of her daughter in September 2006. They were fired two months before Smith died in a Florida hotel in February 2007. 
how long has the trial been going?
The trial, in its seventh week