It's hard to believe that Doutzen Kroes has given birth to two children, especially when she shares superhot Instagram snaps like the one above. On Tuesday, the Dutch-born model posted a photo of herself in a barely there bikini while swimming; she added the caption, "Working out in the pool. #laps #readysetgo." We love getting a glimpse of what Doutzen does to get that insane body — check out more of the Victoria's Secret Angel workouts here — and all we can say is that if swimming laps results in an ass like Doutzen's, push us into the water ASAP. Enjoy Doutzen's latest snap, then check out her recent day on the beach in Miami.