The singer reportedly enjoys spending time with the Two and a Half Men star after they hit it off and exchanged phone numbers at a friend’s party in December.
The 24-year-old is apparently so obsessed with the actor that she even wants to join his Kabbalah group.
Rihanna was pictured leaving Kutcher’s $10 million bachelor pad with her security team in Los Angeles at around 4 a.m. on March 22.
The photographer told TMZ that the singer turned up at midnight with her security team and stayed for around four hours before being whisked away.
The flirting began when Rihanna and Ashton met and swapped numbers in December, which later moved onto texts and arranging to meet. They snuck off to a santa Monica hotel a few weeks ago, the Daily Mail quoted a source as telling the Sun.
They are two single people having a fling, so thought it would be best to meet in secret,” the source added.
Rihanna has told friends he's funny and cute. Both of them love a good time and think they're too busy for anything serious just yet. She's starting to enquire about Kabbalah sessions with his rabbi.”
If she and Ashton are getting really close, she wants to be able to understand it, the source said.
Meanwhile, the singer is also reportedly planning to spend her summer in England with Kutcher.
According to The Sun, Rihanna has asked the 34-year-old actor to accompany her to the UK, when she goes for her London tour.
The singer has also introduced the actor to her younger brother, Rorrey, while in New York.
However, Rihanna is not the only girl rumored to be dating Kutcher after his divorce from Demi Moore.
Earlier this month, the actor was reportedly dating Lorene Scafaria, the woman with whom he was first seen in December. But Kutcher's rep denied the report and said that the two were just friends.