Kaitlyn Bristowe's boyfriend, Jason Tartick, has been by her side since the start of her journey — and win or lose, he'll be there for the end of it. In an interview with ET's Lauren Zima during a break from rehearsals, Kaitlyn opened up about whether she could end Monday's season 29 finale with the mirrorball a proposal. «Yeah, maybe,» the former Bachelorette said when asked if Jason could pop the question when she gets home after the show on Monday.