Al Gore apparently was not able to curb his enthusiasm for Larry David's ex-wife. Star Magazine is reporting that Gore separated from his wife Tipper after 40 years because he’s been having an affair for the past two years with David’s ex-wife Laurie. Laurie and Larry divorced in 2007 amidst rumors that she had cheated with the caretaker of their Martha’s Vineyard home. “Al and Laurie went from friends to lovers,” a source tells Star. “It couldn’t be avoided.” David has vehemently denied the claims.