“Late night hoops!!!!” The Apprentice alum, 45, captioned the image playing basketball with his preschooler.
Proud mama Giuliana Rancic reposted the same photo with a heartfelt message.
“And I thought these two couldn’t get much cuter #obsessed,” she Instagrammed the image.
Last month, Giuliana posted a photo wearing matching Christmas PJs with her son.
The reality star, 42, also posted an inspirational message on her 5-year anniversary of being cancer-free.
Prior to welcoming Duke, Giuliana went through three rounds of IVF treatments before finding out she had breast cancer. The couple put their plans to start a family on hold while Giuliana underwent a double mastectomy.
After beating cancer, the Rancics turned to a surrogate who would later deliver Duke. Unfortunately, the same gestational carrier miscarried their last remaining embryo.
And I thought these two couldn’t get much cuter ❤️ #obsessed ? A photo posted by Giuliana Rancic (@giulianarancic) on