First there were reports that Kylie Jenner was pregnant, but the 17-year-old reality TV starlet quashed those rumors the other day when she went to lunch and showed off her flat stomach. But what on earth was she doing with steady boyfriend Tyga at XIV Karats in Beverly Hills on Saturday?! While the 25-year-old rapper has been all about spoiling his underage girlfriend with fancy bling (he already bought her a diamond-encrusted watch), at this point we wouldn't be surprised if the two were shopping around for an engagement ring!

Earlier in the day Kylie and big sister Kendall made a promotional appearance at Pac Sun, and Kendall later joined the group at the jewelry store as well. While it's great that she's earning her keep, Kylie recently confirmed that she got lip fillers, so we have to wonder who's actually parenting the teen selfie queen...