Twenty-five-year-old Xristina Marie claims she shared a kiss "and a little more" with Smart, 27, during a Miami romp in his car -- before the split with JLo.
According to a new report from The Sun, Smart contacted Marie on Instagram after seeing her in a nightclub and begged her to send him provocative selfies and even asked her to take her clothes off for him during a video chat.
“I was in a club and Casper was smiling and being flirty. Everyone in Miami knows who I am. I think someone would have told him," the Colombian-born transsexual said.
“Then a few days after that I got a friend request from him on Instagram. He started messaging me. We started talking and he met me in his car and we went for a little ride around Miami."
Marie claims Smart was fully aware that she was transgender and didn't seem to mind.
“I said, ‘You know what kind of girl I am?’ And he said, ‘I’m not stupid. My name is Smart,'" she recalled.
“We started fooling around in the car and being touchy. We had a kiss and did a little more.”
And just weeks later Marie says she met up with Smart in Los Angeles and again got busy in the car.
“We played around — a little more than the first time," she said.
"We grabbed each other and we touched. We did everything you can do while driving.”
Marie described Smart's interaction with her on Instagram alleging he asked for a sexy photo of her saying, "Surprise me" and commented on a thong picture she posted saying, "Not good enough."
“I sent him like five or six pictures,” Vissa said .
“There were a couple of semi-explicit ones and then the last one I was completely nude. And he ‘liked’ the post.”
In lieu of the allegations, it was revealed that Smart and Lopez, 44, had actually broken up two months ago, calling it quits in April.
Neither Smart nor Lopez have yet to directly comment on any of the transgender romp allegations yet.