FoxNews: The mother of the man former Republican vice presidential candidate Sarah Palin's daughter Bristol had planned to marry has been sentenced to three years in prison.

Sherry Johnston was sentenced Friday in Palmer, northeast of Anchorage. She pleaded guilty in August to one count of possession with intent to deliver the painkiller OxyContin. Five other felony counts were dropped in the deal, which called for a five-year prison sentence with two years suspended.

The 43-year-old Johnston is the mother of Levi Johnston. He and 18-year-old Bristol Palin were engaged but called off the wedding after their son, Tripp, was born in December.

The Anchorage Daily News reports that Sherry Johnston will serve her sentence at Alaska's only female prison.

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