The model and actress describes her sweet and sentimental proposal

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Molly Sims’s May engagement weekend was full of surprises, from a Sex and the City-esque wedding proposal (it happened in her closet!) to a touching post-popping-the-question visit from her parents, courtesy of husband-to-be Scott Stuber. “He picked my parents up in a town of like, seven thousand, in Murray, Kentucky, in a private plane!” Sims told PEOPLE Saturday at the Chrysalis Butterfly Ball in Los Angeles. “Trust me, they were shocked!” Stuber’s reasoning for the trip? “Her mother is a Southern woman, and I wanted to be a good Southern gentleman and go ask her parents in person, and bring them along,” he said. But Sims had no idea her parents were part of the plan until after the proposal. “I called my brother and I was like, “I can’t get ahold of mom, I can’t get ahold of dad,'” she recalled of the hours before her engagement. “And finally about nine o’clock, I called my brother and I was like, ‘Listen, mom and dad are missing! I just want you to know that.’ Then, when Scott asked me, I called my brother back and I was like, ‘I’m engaged!’ and he was like, ‘I know.’ Then I went downstairs and my parents were at the kitchen table.” It was then that Sims got to reveal her ring, a glimmering, cushion-cut sparkler. “I love everything about it!” she told, adding that she had “no idea how big it is.” Probably because she wasn’t privy to the details: “[Stuber] designed it,” she said. “He did it with my girlfriend on his own. He surprised me; I never sent him a picture. He did it all.” Tell us: What do you think of Sims’s ring? –Kim Peiffer, with reporting by Reagan Alexander