Ben Affleck's former nanny and alleged fling Christine Ouzounian is rumored to be considering penning a tell-all book about her relationship with the Hollywood actor.

OK Magazine reports Ouzounian has grown annoyed at Affleck's recent treatment, which reportedly includes cutting off all communication with her and changing his cellphone number. She is reportedly now looking to get even.

"Christine is very upset and says Ben should be worried," a source said. "In her mind, this is far from over."

Word is the nanny's book would delve into intimate details about the time she spent with Affleck and would offer a glimpse into the workings of his long-troubled marriage.

Ouzounian served as the nanny for Affleck and now estranged wife Jennifer Garner's three small children. Widespread rumors of an affair between Ouzounian and the "Good Will Hunting" actor apparently caused the celebrity couple to announce earlier this summer that they were pulling the plug on their 10-year union.

More recently, Affleck and Garner have been rumored to be spending more time together, amid rumors that she is now pregnant with what would be their fourth child.

"Ben is trying to spend time with the kids, but he's really worried about Christine's next plan of action," a source said. "Christine's become a real problem for him -- but he knows it's all his own fault."

Meanwhile, Ouzounian is rumored to have confronted Affleck about promises he made to her.

A source added, "Ben didn't have an answer, but he knew better than to engage any further."

Reports are Ouzounian is also weighing the option of appearing on the British TV show "I'm a Celebrity...Get Me Out of Here." Sources indicate producers are interested in having her spice up the show by serving as "eye candy."