Report: Sienna Miller is Homewrecking

Recent topless photos of Sienna Miller kissing Balthazar Getty have shoved this steamy affair into the spotlight.

The actress - best known for her flings, which include a roller-coaster relationship with Jude Law and one with Rhys Ifans that ended just weeks ago - has been quietly dating Getty for "at least two months," a source said to People Magazine.

Here's a shock: Sienna Miller is involved in a controversial relationship.

While the same source confirmed that Getty and wife Rosetta "have been living separate lives for a while," that doesn't mean the timing of the affair isn't hurtful.

Balthazar and his wife were married in May 2000 and had their fourth child together 10 months ago. It's enough to make Alex Rodriguez proud of the actor for such inappropriate behavior so soon after the birth of a baby.

"It's humiliating," a friend said about the Miller/Getty relationship. "Rosetta left the country to protect the kids, and he continues to see Sienna publicly."