According to insiders, the political offspring, 46, was spotted packing on the PDA with Palm Beach socialite Bettina Anderson despite his engagement to the former prosecutor, 55.

"She seemed totally smitten with Don - and he with her," a source claimed about Trump Jr. and the Republican "it" girl's August brunch date at the Honor Bar in Palm Beach, FL. "They looked totally relaxed, she wearing a white shirt tied off to show her midriff and wide leg pants, he in shorts and a t-shirt."

An eyewitness noted how the two appeared to be way more than friendly during their time together. "They were definitely on a date," the insider added. "They weren't exactly making out, but the kisses were romantic, and you could tell they were intimate with each other."