06/04/2012 at 06:00 AM EDT
, hubby Brian Austin Green and his son Kassius recently had a little family outing – but it was Fox who reaped the benefits of the leisurely day.
The reportedly pregnant
actress got a manicure at Bellacures in Studio City, Calif., while Green and his son chatted in the back of the salon. Using OPI, she had her nails colored with their Pedal Faster Suzi shade.
But leaving the pampering to Fox didn't seem to faze the males because an onlooker tells PEOPLE, "They [seemed like they] had a great time just relaxing and hanging out together."
The source says the trio passed on any food or drinks, but Fox "did not [appear to] have a baby bump at all." – Jessica Wedemeyer