Trump and Guilfoyle have not publicly called off their engagement, though sources told PEOPLE in September that the couple have allegedly been spending lots of time apart

The socialite was spotted sitting behind Trump and Guilfoyle at the Republican National Convention in Milwaukee, Wis., in mid-July. Anderson was also photographed chatting with Don Jr.’s ex, Vanessa Trump, 46, at the event, and we’d heard that the two are close friends, and that Anderson attended the convention with Vanessa.