When you know, you know! Which is why Tarek El Moussa and Heather Rae Young moved in together just six months into their relationship. “After our first date, we were inseparable,” the Fixer Upper star tells Us. Selling Sunset’s Young, 32, was already living with El Moussa in his Orange County, Calif., home — which is close to his kids, Taylor, 9, and Brayden, 4, who live primarily with his ex Christina Anstead — so renting a pied-à-terre in West Hollywood was no big thing. “It was so natural for us,” gushes Young. HGTV’s El Moussa, 38, says the L.A. pad is “a whole new world,” and that their favorite activity is people watching through their huge windows. They love it so much, he says, they might just “end up…
