Kourtney Kardashian spends quality time with son Mason, 12, in Calabasas

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She's a thriving entrepreneur whose lifestyle brand Poosh recently created a candle with a very cheeky name in collaboration withGwyneth Paltrow's Goop.But Kourtney Kardashian was in full mom mode on Thursday afternoon while spending quality time with son Mason, 12, in Calabasas, California.The reality TV star, 43, flashed her toned midriff in a sheer patterned wrap top layered over a cropped black tank top.

Mom mode:Kourtney Kardashian was in full mom mode on Thursday afternoon while spending quality time with son Mason, 12, in Calabasas, CaliforniaShe styled her sexy upper half with some baggy black cargo pants and what appeared to be a pair of Dr Marten combat boots.Kourtney's short raven hair was swept back in a low ponytail and she shielded her eyes from the SoCal sun with a pair of designer shades.

She completed her ensemble by carrying around a small leather purse.As for Mason, the preteen kept it cool in a black Justin Bieber hoodie from the singer's Justice World Tour.

Sheer perfection:The reality TV star, 43, flashed her toned midriff in a sheer patterned wrap top layered over a cropped black tank top Effortless:Kourtney's short raven hair was swept back in a low ponytail and she shielded her eyes from the SoCal sun with a pair of designer shadesHe also rocked a black cap, baggy pants and a pair of bright white sneakers.Mason strolled closely beside his famous mother as they ventured out of a store towards their parked vehicle.Kourtney shares Mason, as well as nine-year-old daughter Penelope and seven-year-old son Reign, with ex boyfriend Scott Disick.She and the 39-year-old Talentless founder split in 2015 after nearly a decade together.