Teigen and Legend openly shared their grief with a series of personal photos taken at the hospital.
Teigen’s new tattoo joins one that reads “John Luna Miles” in honor of her husband and their two other children.
In her essay, she touched on how she and Legend have helped Luna, 4 and Miles, 2, understand the loss.
“Jack will always be loved, explained to our kids as existing in the wind and trees and the butterflies they see,” Teigen wrote. “Thank you so much to every single person who has had us in their thoughts or gone as far as to send us your love and stories. We are so incredibly lucky.”