"We are lucky to have 3 new studs in the fam: Pete, BX, and EJ!" the recently engaged star Tweeted Sunday, referring to her sister Ashlee's husband, nephew Bronx, 2, and her freshly minted fiancé.
Make that four: "Oh and I can't forget Bentley!!!" she added, alongside a photo of her snoozing canine cutie.
The family all stayed at Simpson's parents' house on Christmas Eve to celebrate the holiday. As for Johnson's first Christmas with the brood – the couple became engaged in November – Simpson, 30, said her free agent NFL player made her holiday a touchdown.
"Eric is the perfect addition to our family," she gushed on Twitter.
And Jessica wasn't the only Simpson caught up in the holiday spirit. Little sister Ashlee, 26, also took to Twitter to spread some Christmas cheer.
"Best day ever," she Tweeted. "I feel blessed to have so much joy, and amazing love in my life."