Jessica Simpson will reportedly spend her third wedding anniversary alone - further fueling rumors her marriage to Nick Lachey is on the rocks.

The sexy actress is said to be planning to spend the landmark date later this month in Nairobi, Africa, without Nick to promote her charity Operation Smile - which aims to raise money for children born with cleft lips in the deprived region. Jessica will later be joined by her father, Joe, and personal assistant Cacee Cobb and the trio will go on safari Kenya - again without Nick. Sources close to the pair claim the trip is another indication of how much Jessica and Nick's relationship has deteriorated and insist it is only a matter of time before they split for good.

However, a representative for the couple, who starred together in MTV show Newlyweds, insists the pair are not on the verge of splitting, and Nick is only missing the trip because of prior commitments. The spokesperson said: "Nick will be unable to join Jessica on the trip because of work commitments in Los Angeles."

Rumors have been rife in recent months Jessica and Nick's marriage is in trouble, fueled by unconfirmed accusations Nick cheated on his wife with a college student.

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Jessica Simpson On Starpulse
Nick Lachey On Starpulse
Newlyweds On Starpulse