Baby's big day out: Kendra Wilkinson's son Hank Baskett IV is headed to the Playboy Mansion.

"Goin over to the mansion today to visit @hughhefner," she Twittered Monday. "Lil Hank gets to meet him today!! So excited!"

Wilkinson, 24, and her husband, Indianapolis Colts wide receiver Hank Baskett, welcomed the boy last Dec. 11. (At the time, Hefner, 83, Wilkinson's ex, called the baby's arrival "a wonderful Christmas present.")

She recently Twittered that she can't believe how fast her son is growing. She just put him "in a 6-9 [month] outfit [and] it fit," she wrote.

Despite her hectic mommy schedule, Wilkinson said she and her husband still find time for loving.

"When the baby sleeps, we have sex!" she recently told E! News. "That's what it is for us. That's why it's so cool to be young parents because we have the energy to do that."