Kylie Jenner showcases hourglass curves in skintight jersey dress three ...

Kylie Jenner showcases hourglass curves in skintight jersey dress three months after Stormi's birth

She gave birth less than three months ago.

And Kylie Jenner proved she was quite the hot mom on Tuesday, sharing a photo of her hourglass curves covered in a tight, gray t-shirt dress to Instagram .

The social media favorite, 20, gave the camera a smoldering glance as she captioned the shot: 'That look because KOURT X KYLIE just dropped on the site.'

The new mom, who gave birth to daughter Stormi back on February 1, was referring to her new makeup partnership with Kourtney Kardashian, 39.

Though the photo was promoting Kylie's new beauty line, it was hard to take her eyes off her knock-out figure.

Leaning up against a brick wall, the girlfriend of rapper Travis Scott showed off her bountiful backside and full breasts in a form-fitting gray dress.

Kylie glitzed up the simple look with gold bracelets and a matching watch along with trendy micro-shades with crystal frames.

She let her long dark tresses cascade down in textured waves while she turned over her shoulder to flaunt her beauty look, which consisted of peachy pink lips and long lashes.

Meanwhile, sister and makeup-line collaborator Kourtney was also plugging their line with her own sexy selfies on Instagram.

She stunned in a high cut nude body suit with plenty of side boob and also made a display in a ribbed white two-piece look which put her abs front and center.

In real life, the mother-of-three was on Capitol Hill in Washington DC where she met with congressional leaders to talk about updating cosmetics legislation.

NBC Washington reporter Jennifer Vasquez covered the hearing on Twitter, where she explained: [Kourtney] is meeting with lawmakers to update an 80 year old FDA law to help make beauty products safer.

'Kourtney Kardashian says that as a mom it's important for her to know what's in her personal care products. She's calling for new legislation that will give cosmetic companies a guideline of how much of a chemical they can use.

'When it comes to the products I use on my kids, I do not play around,' said Kardashian at the Russell Senate Office building on Tuesday according to Us Weekly .

'Everyone should have the right to healthy products and personal care and that's why I wanted to come and make this a bigger deal.'

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