"Luxurious" singer Gwen Stefani recently pulled the plug on her marriage to Gavin Rosdale and reports now reveal that cheating was allegedly involved. According to TMZ, the No Doubt frontwoman believed her husband was unfaithful during their 13-year marriage.

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One source details the split as "a long time coming," saying that the former couple have not been seeing eye to eye for a while. TMZ reports that Gwen complained about Gavin being away from home for too long while touring with his band, Bush, from December 2014 through March 2015. Reports say that the "Hollaback Girl" crooner put pressure on her hubby to put off touring and stay home, but he felt her request was hypocritical since she was also on the road with No Doubt.

The pop star filed for divorce on Monday. Both Gwen and Gavin are seeking joint custody of their three children.

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(Photos from left: Frederick M. Brown/Getty Images,Araya Diaz/Getty Images for Safe Kids Worldwide)