Jerry Lee Lewis married Myra when she was 13. No one much cared.
No, it hurt his career immensely, also being a cousin didn't help.
Only in England. No one here cared.
Jerry Lee Lewis - Biography - IMDb
Many people predicted that Jerry Lee would be bigger than the King of Rock-n-Roll -
Elvis Presley. In late 1957 the audiences at one of his shows stormed the stage when he set a piano on fire.
Chuck Berry was supposed to have ended the evening's show, but he refused to go on, wisely understanding that he could never top what Jerry just did. Elvis went into the army in the late winter of 1958, so Jerry Lee was now virtually alone at the top of the rock heap. All was not rosy, however. Problems did arise--very serious problems.
In 1957, he married for a third time, secretly, to the 13-year-old daughter of his cousin and partner J. W. Brown, 'Myra Gale Brown (I)'. Her parents were deeply hurt when they found out, but after a discussion with
Sam Phillips, they forgave Jerry. The marriage was unknown to the press and fans until Jerry's arrival in England for a tour in the spring of 1958. Fans again stormed the stage -- but this time to express their disgust. The marriage was front-page news around the world.
His career was in shambles. He had just signed a five-year contract with Sun Records, and he did continue to record songs until 1963. During the last years of the contract, however, he made very few rock songs. Most of his compositions were ballads, possibly due to his depression at the direction his career had taken.