Lauren Silverman Steps Out with Baby Bump and a Smile
08/01/2013 AT 04:15 PM EDT
Despite her estranged husband Andrew Silverman listing "adultery" as reason for their split, Lauren, 36 – who got pregnant with Simon Cowell's child while she was still married – stepped out all smiles on Thursday in the Hamptons.
There's a reason for the New Yorker's jolly appearance. A source told PEOPLE that she "is ecstatic to be with Simon" and was unhappy in her previous relationship.
Revealing her barely-there baby bump when she was photographed out with her 7-year-old son Adam, Lauren was dressed casually in mid-length black leggings and a flowy white top.