A British woman has been jailed for 18 months for sinking her estranged husband's 75,000-pound yacht on Valentine's Day, a media report said

Mandy Fleming "lost it" when she realised her spouse had splashed cash on his boat after pleading poverty to her, the Guardian newspaper reported Thursday.

She drilled three holes in the hull of the boat, which was berthed at Brighton Marina, and turned on cooker gas taps turning it into a "bomb", the Old Bailey heard.

Fleming, 47, of Sheerness, Kent, had admitted endangering life by causing criminal damage in 2004, during a hearing last month, the newspaper said.

She wept as she was sentenced Thursday, with judge Richard Hone telling her: "You were a manipulative, angry and troubled individual."

She was told she would have to serve half the sentence, less the two-and-a-half months she had initially spent in custody.

Fleming had gone to the yacht for a "menage-a-trois" with her then lover, the court heard. After seeing new electrical equipment and some bills for work which had been done on the yacht, she rang her husband and berated him for spending money on the vessel.

The couple married two years before the incident and the yacht was bought during the marriage. It was her third marriage. They have since divorced.