The 28-year-old Ouzounian has been staying at the Hotel Bel-Air, Affleck's longtime go-to home away from home – and a source tells PEOPLE "Ben is taking care of Christine's expenses at the hotel."
Affleck's rep has denied the star had an affair with Ouzouzian, and could not be reached for comment about whether he is now footing her hotel bill.
Ouzounian was first spotted entering the posh L.A. hotel on July 29, the day news broke of the alleged fling. She was photographed there again on both July 31 and this past Sunday. An eyewitness also tells PEOPLE that Ouzounian was still staying at the retreat on Tuesday.
"Christine is enjoying her hotel stay," the eyewitness says. "She acts like she is on vacation. She has been spotted by the pool several times, the spa and Wolfgang Puck's restaurant. She seems relaxed and happy. She hangs out with girlfriends, reads magazines and is on her phone a lot."
A friend of Ouzouzian claims to PEOPLE that the ex-nanny and Ben "are in touch every day, all day long. He got them phones just for each other."
Media attention has surrounded the ex-nanny and her involvement in Affleck and Garner's June 30 split. Ouzounian told friends that she and Affleck slept together, as detailed in this week's PEOPLE cover story, and sources close to Garner also say the two had a fling. A source close to Affleck told PEOPLE that the Batman v Superman: Dawn of Justice star had only a "work relationship and a friendship" with the blonde, adding "Ben's friendly, but it's not always meant to be flirty."
Ouzounian told friends that she and Affleck had romantic rendezvous at the Hotel Bel-Air starting this spring, sources have told PEOPLE.
Ouzounian's friend says that the ex-nanny is "doing well" and that she said of Affleck, "he trusts me."
For much more on Affleck and Garner's difficult split –, the nanny allegations and how Garner is coping, pick up this week's issue of PEOPLE, on newsstands Friday