She leaves no doubt in two adorable Instagram photos marking four years together with her fiancé and father of her two children.
"Happy 4yr anniversary baby!! I am so honored to be the mother of your babies and loved by you every moment," Simpson, 33, wrote next to a cute selfie in which she's seen smooching Johnson, 34.
In the second pic, the couple are posing in front of a painting at the Tom Everhart Studio in Venice, California. "I can't wait to marry you!!! Best 4yrs of my life!!!" Simpson wrote.
On the topic of that wedding, likely to happen this summer, Simpson has grand plans. "It'll definitely be extravagant. I don't do things small," she told NBC's Today show earlier this week.
But of course, their daughter Maxwell, 2, and son Ace, who turns 1 next month, have been – and remain – the priority. Simpson shared a delightful photo of the kids on Instagram this week, too, and tells Today they're just a joy.
"We get up with the kids. We do breakfast," she said. "I'm always with my loving fiancé, who I adore more than anything, and, well, of course, my kids. They're all equal."