Brittny Gastineau wore a black dress while having lunch with her mother Lisa Gastineau and friends at the Ivy. Reality star-turned-jewelry designer Brittny Gastineau recently shared a romantic night in L.A. with Olympic champion Michael Phelps. But as for reports she was spotted buying a home pregnancy test at an N.Y.C. pharmacy soon after? “I never did,” she tells PEOPLE exclusively.

The daughter of football star Mark Gastineau also throws cold water on the Phelps romance, confirming that the two are no longer dating. “I’m too busy to date anyone because I’m working so hard on my jewelry line,” she says.

And while Gastineau is not pregnant, she does have big plans for becoming a mom – someday. “It would be great to be pregnant at the same time as my BFF Kim [Kardashian],” she says of her longtime pal, who recently made headlines thanks to her budding relationship and sudden split with Halle Berry’s ex Gabriel Aubrey.

Adds Gastineau: “We’re both single!”