Abigail White, 23, allegedly murdered her partner Bradley Lewis, 22, at their home in Kingswood, Bristol, England last week.
Paramedics were called to the semi-detached property in South Gloucestershire, England at around 8:20 pm on March 25.
Bradley, understood to be a dad-of-three, was stabbed in the chest and rushed to hospital but died six hours later.
White appeared at Bristol Magistrates Court yesterday dressed in a grey tracksuit, to confirm her name, date of birth and address.
Adult model White has been posting thousands of racy pictures and videos of herself on OnlyFans.
Using the pseudonym Mitzee Lewis online, White posts the semi-naked images on social media and invites viewers to subscribe to her account for $5 a month.
She was last active on the website just two days before she allegedly killed Bradley at the property in South Gloucestershire.
White was remanded in custody pending a possible bail application at Bristol Crown Court on Wednesday and a plea and trial preparation hearing on April 25.
The development comes after Bradley’s family released a heartbreaking tribute to the dad.
They said in a statement: “Our wonderful much-loved son Bradley, taken from us too early.”
Devastated pals also paid tribute following the tragedy.
One said: “We lost a fantastic, beautiful person without saying goodbye.
“I hope he knows just how much and how many people loved him.”