Kourtney Kardashian, the oldest, most responsible sister, honored the birthday of her ex Scott Disick with a wistful photo from the good old days. Kourtney posted the flirty, suggestive photo of her baby daddy to remind you how their kids were conceived. 

Happy birthday baby daddy!

A post shared by Kourtney Kardashian (@kourtneykardash) on

The former couple are parents of three kids: Mason, 6, Penelope, 3, and Reign, 1, but that doesn't stop them from being glamorous.