Fans concerned by 'creepy' video of Aoki Lee Simmons, 21, and 65-year-old 'boyfriend' Vittorio Assaf

Kimora Lee Simmons' daughter Aoki has sparked concern after sharing an Instagram live.

In recent days, it's been reported that Aoki, 21, is dating 65-year-old Vittorio Assaf, after they were snapped on holiday in St. Barts together.

While they've been pictured sharing a kiss on the beach in recent days, they're both yet to address their romance.

However, in an Instagram Live, Aoki kept referring to someone as her 'boyfriend'.

"Last day in St. Barts. I’m so sad but I’m very happy," she said in the live video that was screen recorded by fans.

"When I return home, everyone who knows me will be getting a happier, more chilled out version of me."

I mean, I'm sure a trip to St. Barts with your new partner would do that for a lot of people.

A male voice is also heard in the video, but Aoki never pans the camera round to show them. Chatting to the mystery man, she repeatedly calls him 'baby'.

"Would you like to share your favorite thing about the trip?" she seemed to ask the Serafina co-founder, to which he replies: "You. [Being] with you."

In the rest of the video, Aoki is evidently smitten with whoever she is with.

However, in the wake of the photos surfaced and the 44-year age gap between her and Vittorio, people have expressed concerns.

"This is disturbing," one person wrote.

"Boyfriend?? That’s a greatgrandfriend," insisted another.

Someone else commented: "How do we exit this group chat? This is suuuuper cringe and kinda creepy."

"What does a young girl like that have in common with an old man? This is weird," added another Instagram user.

Some defended their relationship and pointed out that, while there's a significant age gap between Aoki and Vittorio, the 21-year-old is an adult.

"She can do what she want to do she’s grown leave her alone," someone wrote.

"Do you Aoki," added a second.

UNILAD has contacted Aoki and Vittorio's reps for comment.

If Aoki and Vittorio are in fact dating, they're not the first (and probably won't be the last) to have such a large age gap.

In fact, a couple who have a 39-year age gap have publicly defended their romance.

Willow and David - who is nearly four decades his partner's senior - met on Tinder, and after an hour of dating, became an official couple.

While some have called Willow a 'gold digger', she insists that she never knew of David's wealth when they first got together.