“Nighty Nite,” the mom-of-two, 34, captioned the shot.
In the precious pic, the kids are cuddled up to their famous mom under blankets on the couch.
Simpson, who is married to the kids’ father, former football star Eric Johnson, recently shared another shot on social media.
“Oh yea girl…We are proud to be in our bathing suits!!” Simpson captioned a revealing photo of herself wearing a black one-piece. “#hardworkpaysoff.”