Katie Lambard, left, and Michael Lambard are seen in court on Thursday, August 27, 2009.

Michael and Katie Lambard were each sentenced to 33 months in prison.

Prosecutors say the two preyed on Margaret Martin, first befriending her and adopting her as their grandmother before taking up to $350,000 of her money.

Martin, 90, didn't live to see justice served, but she talked to KOMO News in April of last year after losing her entire estate to the couple.

"I thought, 'What have I done to deserve this, you know?'" she said.

But in court on Thursday the Lambards cried, claiming Martin gave them access to her bank accounts and credit cards.

"She'll tell anybody, 'I'll spend my money how I want. If I want them to have it, they can have it,'" Michael Lambard said.

Not so, according to prosecutors.

"She had no idea how much they were taking from her no idea," said Senior Deputy Prosecuting Attorney Page Ulrey.

Car dealers raised a red flag when Katie Lambard bought three new cars with checks signed by martin.

"Buying thing after thing for themselves -- not for Margaret, but for themselves," Ulrey said.

The couple took $200,000 when they helped sell Martin's home in Seattle's Greenwood neighborhood.

After Martin learned of the Lambards' betrayal, she moved into a retirement home where her health deteriorated.

"I keep thinking how I could have misjudged them so, or what did I do that made them think it was OK to do that?" she said last year.

Martin died in February. And according to court documents, when Katie Lambard visited Martin at the nursing home for the last time to return some items, she approached Martin in the waiting area, threw the items at her and walked away.

But despite the woman's heartbreak and the prosecutors' claims, the Lambards say they never set out to take anything from the elderly woman.

"Contrary to what the prosecution said, Margaret meant everything to us," said Michael Lambard. "We're not these malicious people that they're trying to make us seem to be. Our crime is that we're uneducated and we didn't know what we were doing. (We were) just doing what she wanted us to do."