Aoki Lee Simmons, 21, and new boyfriend Vittorio Assaf, 65, pack on the PDA as they wrap up St. Barts vacation

Aoki Lee Simmons and Vittorio Assaf continued packing on the PDA during the final day of their St. Barts getaway.

Photos obtained by Page Six show the 21-year-old model and the 65-year-old restaurateur kissing on the beach last Thursday.

Simmons rocked a simple black halter top bikini and thong bottoms. She added a long silver necklace and a blue body chain around her waist while sipping on a bottle of iced tea.

Assaf, for his part, wore a pair of blue swimming trunks and accessorized with a silver necklace and matching bracelet.

It was the same ensemble he wore while locking lips with the youngest daughter of Kimora Lee Simmons and Russell Simmons on the same beach earlier in the week.

A 43-year age difference didn’t stop the pair from frolicking in the sun and passionately kissing, before taking a dip in the crystal blue water.

At one point, the Serafina co-founder even lifted his hands in the air and closed his eyes while peacefully basking in the Caribbean sunshine.

Later that day, fans noticed Aoki’s bizarre behavior while filming an Instagram Live.

She referred to Assaf as her “boyfriend” in the video, as seen in screen-recordings shared by several fan accounts.

“Last day in St. Barts. I’m so sad but I’m very happy,” she began. “When I return home, everyone who knows me will be getting a happier, more chilled out version of me.”

The Harvard University graduate then seemed to slur her words before asking Assaf multiple times to buy her a crepe.

“Would you like to share your favorite thing about the trip?” she asked the Italian businessman, who responded, “You.”

Both of her parents have shared cryptic social media posts in the wake of the new romance, though the rising model hasn’t addressed the relationship herself since returning to New York City over the weekend.

Russell, 66, who is 18 years older than Aoki’s mom shared a photo of his daughter on Instagram, writing, “love you always im always waiting for any call any time ❤️.”

Meanwhile, Kimora Lee, 48, admitted that she was “on my last nerve right now” in a cryptic post of her own.

The former couple, who were married from 1998 to 2009, are also parents to 24-year-old daughter Ming Lee Simmons.

Assaf, for his part, is single after his ex-wife, Charlotte Bonstrom, left him for her twin sister’s ex-husband, Thierry Gillier.