Abbie Cornish - plus Ryan's kids - equals a prime pap target!

Abbie Cornish is getting good reviews for her role as Ryan Phillipe's fiance in "Stop Loss." 

But it sounds like she's also been playing a real-life Mom to Ryan's kids. It's been rumored that she was the reason Reese Witherspoon and Ryan divorced. But being "close friends" is all Abbie and Ryan will publicly admit to.

In the April issue of Details, Abbie says the paparazzi, who usually leave her alone when she's by herself, swarm to get shots of her with Ryan's kids. In the piece, it's reported that her eyes began to water as she admitted, "It's difficult, because you're just taking a kid into a store. The bottom line is that you're just living."

Click here for full scoop on Abbie and her 'underground Aussie hip-hop' band! Who knew?

Photos: Abbie at the Australian MTV Music Video Awards last year.

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