We knew the day would come when heartthrob Ashton Kutcher would once again become a family man. Now that he's engaged to Mila Kunis and has a baby on the way, it only makes sense that the next step is parting ways with his contemporary LA mansion. According to the LA Times, Ashton is quietly listing the Hollywood Hills home for a cool $12 million. The rather impressive spread — once coveted by Justin Bieber himself — includes five bedrooms, a gym, a sauna, and a wine cellar. But the selling point has to be the infinity pool and breathtaking views surrounding the 9,385-square-foot pad. Let's just say this place is anything but baby-proof . . .