Gwen Stefani ended 13 year marriage after her husband cheated with family nanny

Gwen Stefani recently revealed her split from husband of 13 years Gavin Rossdale was completely 'unexpected'.And it had now been alleged that Gavin was cheating on her for three years with their family nanny Mindy Mann, who was charged with looking after their three sons .

The new issue of Us Weekly claims the rocker initially denied having an affair with the nanny after another one of their nannies supposedly discovered messages and nude photos on the family's iPad and informed Gwen.

 At the time, Gwen discovered explicit texts between Rossdale and the nanny — including nude photos of Mann and their plans to meet up for sex — on the family’s iPad

“The iPad was linked to Gavin’s phone,” a family source tells Us. “One of the other nannies discovered the exchange and told Gwen.” Mann was soon fired.When he finally confessed to the affair months later, Gwen made the decision to end their marriage.

 The couple announced their plans to divorce in August.

 The admission “completely devastated her,” a source tells Us. “She was mortified, livid, and embarrassed.The sexual relationship lasted for more than three years -- including the time period when Stefani was pregnant with Apollo.