Kourtney Kardashian may be a calm, stable mother-of-three regardless of her baby daddy Scott Disick's cheating ways, but just when you thought she had her sh*t together, she goes and forgets to wear pants!

KK sported a velour sweatshirt, the uniform of choice of all of the Kardashian-Jenners these days, but WITHOUT PANTS! She paired them with Gucci sneakers and a coy smile. We're not guessing this fashion omission may have been intentional. Perhaps to make the cheating Lord Disick jealous???

We asked her if she's spoken to Scott after her Miami fling with several different girls -- she how she reacts ...