When she wasn't doting on her darling son Flynn, Miranda Kerr spent much of her weekend in Malibu with boyfriend Evan Spiegel.

Miranda and Evan enjoyed dinner at Nobu on Saturday night, and on Sunday we spotted the lovebirds at Soho House for a lunch date. They seem joined at the hip, but apparently the Snapchat founder has found some time to break away from his lady love -- and go ring shopping. Yup! It's getting that serious...

Evan is “ready to take the next step” with Miranda, reports Us Weekly. “They are both completely smitten and Evan's starting to look at rings,” a source told the mag, adding that the couple want to have an “extravagant wedding, in true Evan style." He's already bonded with Miranda's son Flynn, and not only that, but the supermodel recently revealed that ex Orlando Bloom thinks the tech mogul is "great."

Back in January, Miranda gushed about her younger man, telling The Edit, she had “the best of both worlds” with him. “He’s 25, but acts like he’s 50,” she explained. “He’s not out partying. He goes to work in Venice. He comes home. We don’t go out. We’d rather be at home and have dinner, go to bed early."