Andy Williams’ mother-in-law scores Mustang convertible at Trump 29

Already lucky with her family tree, singer Andy Williams’ mother-in-law found more fortune at Trump 29 Casino, winning a red Mustang convertible.

“That was her first time in any casino,” Williams’ publicist, Paul Shefrin, said Tuesday. Shefrin said he’s not sure exactly what day Mary Jane Myer won the car, but said Williams, a Palm Springs-area resident, told him about it on Friday.

Several calls to Trump 29 Casino in Coachella were not returned Tuesday.

The “Moon River” crooner had taken family and friends out to dinner at the casino’s Rattlesnake restaurant.

Afterward he gave his mother in-law and two others in the party $100 to gamble while he and his wife played blackjack.

“She went off to the slots and bang,” Shefrin said. She won by playing two quarters.

The slot machines were located about 200 yards away from the blackjack tables.

According to a press release, Williams became aware of the win after a friend ran up to the blackjack table and said, “You better come quick. Your mother-in-law… .”

Before his friend could finish the sentence, Williams hurried to the slots, made it through the large crowd circling his mother-in-law and asked her what was wrong.

Her reply: “Wrong? I just hit the jackpot… .”

Williams begins a six-week engagement on April 23 in Branson, Mo., and plans on having Myer there as a good luck charm.