Jake Paul is not only DENYING he sexually assaulted Tik Tok star Justine Paradise -- but he's vowing to sue her defamation.
24-year-old Paradise posted a video on YouTube last week alleging Paul forced her to perform oral sex on him after she made it clear she did NOT consent.
In her video, Paradise says she was hanging out with Paul art his L.A. area home when they began to kiss -- something she DID consent to doing.
But Paradise claims Paul pushed for sexual intercourse and she shut him down .