Jessica Simpson: 'Motherhood Is the Best Thing I've Ever Experienced'
05/09/2012 AT 09:05 AM EDT
"I am so in love with baby Maxwell," Simpson, 31, Tweeted Tuesday. "I want to cry every time I look at her. Motherhood is by far the best thing I've ever experienced."
The first-time mom isn't the only one doting over the new addition to the Simpson family.
Proud grandfather Joe Simpson called the newborn "a miracle" last week, and Ashlee Simpson told PEOPLE she's also "in love" with her niece.