’90 Day: The Single Life’s Cortney Reardanz and Sophie Sierra sit down with ET to interview each other! The reality stars reflect on what they’ve learned from their infamous relationships followed by the franchise, and reveal how they’ll know when they’ve finally found the one. Cortney also responds to fan suspicion that her new boyfriend (and fellow ’90 Day’ star), Colt Johnson, is using her, while Sophie reveals whether she’s heard from Chantel Everett since she began dating her ex, also from the ’90 Day’ family, Pedro Jimeno. ’90 Day: The Single Life’ premieres Monday, Feb. 9 on TLC.