Her Alibi: Lauren Silverman Told Husband She Was Visiting Mom -- When She Was Sneaking Around With Simon Cowell!

Lauren Silverman told her husband Andrew that she was visiting her mother Carole Saland in Miami when she was actually sneaking around with her soon-to-be baby daddy Simon Cowell, RadarOnline.com has learned.

“At the same time," a source told the NY Post, "she was telling Andrew they should give their relationship another try, possibly to take them over the 10-year mark.” (The milestone would trigger a clause in the couple's prenuptial agreement, the paper reported.)

One insider told the paper it was “interesting that Lauren used her mother as her cover story” with Andrew, a 37-year-old real estate developer.

 Simon Cowell And Lauren Silverman Get Cozy

The 36-year-old, who's reportedly 11 weeks pregnant, is believed to have conceived with the music mogul over the pond when he was taping Britain’s Got Talent in his native England June 8, according to the report.

Lauren’s attorney Bernard Clair told the paper that "cheap shots aimed at Lauren and her family, by people who believe they are supporting Andrew, serve only to sabotage ongoing efforts by our client and her husband to settle this matter.