Mark Sagliocco/Getty for Hamptons Magazine
Next up on the menu for chef Emilio Vitolo Jr.? Fatherhood!
The couple shared photos from a sex reveal celebration, where they posed together holding ultrasound photos as Piccininni hugs her emerging bump.
"Half of me & half of you 💕 we're having a baby girl💕," they captioned the post.
Piccininni, 24, also reshared photos and videos on her Instagram Story of the event, where guests watched as the couple cut into a cake and found pink filling, indicating a baby girl is on the way.
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The pair first went Instagram official with their relationship in August, with Piccininni sharing silly photos of the two hanging out in the Hamptons during that time.
"They split several weeks ago. There was no drama," a source told PEOPLE of the pair.
"It was amazing while it lasted, but they are at very different places in life. Emilio has no hard feelings. His life is in N.Y.C.," the source added at the time. "Katie can't wait to get back to work and to travel again."