“He’s all mom don’t be movin in on ma cone,” the Younger star, 29, captioned the cute snapshot.
Meanwhile, Hilary’s sister Haylie Duff enjoyed an ice cream treat with her daughter Ryan, nearly 2, and their mother Susan.
“Ice cream date with GG,” Haylie Instagrammed the image.
Hilary welcomed Luca with ex-husband, former NHL star Mike Comrie.
Haylie shares Ryan with fiancé Matt Rosenberg.
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Ice cream date with GG ?? A post shared by haylieduff (@haylieduff) on