The Lord and his Lady?

A new report claims Scott Disick is seriously considering proposing to 20-year-old girlfriend Sofia Richie! After dating for two years, a source tells Us Weekly the couple have "talked seroiusly about getting engaged" and that a wedding "is a real possibility."

Despite their 16-year age difference, the two are apparently very in love and feel that they are "life partners." Meanwhile, the bad boy famous for his roving eye was recently accused of having hooked up with his almost sister-in-law Khloe Kardashian! Khlo posted pix from Scott's 36th birthday party and one fan commented, "Refuse to believe they've never shagged," on a shot of the two together. After garnering more than 5,000 likes, Khloe felt the need to respond, so she wrote: "I feel sad for you because apparently you don’t have relationships in your life that can be completely platonic. You don’t have relationships where someone genuinely loves and cares about you without wanting anything else besides a friendship."

Now that THAT'S out of the way, perhaps Scott can put a ring on it and make Sofia officially Mason, Penelope and Reign's step-mom?!

We spotted Sofia out yesterday, gassing up her Range Rover and later, having dinner with a friend. You think she's talking about wedding plans with her bestie? ...