Sienna Miller Helped End Sean Penn Marriage

Although Sienna Miller isn’t being blamed directly for causing Sean Penn and Robin Wright to initiate a divorce, Sienna certainly didn’t help matters. Rush and Molloy report:

A source recalls a party in a suite at a New York hotel where they both were staying.

"Sienna was sitting on Sean’s lap," according the source. "She was dressed very sexily. She had her arm around his neck." That night, claims the source, they stayed up quite late.

One Penn friend maintains there was never anything romantic between them. "Sienna is like that with everyone," says the friend. "She’s very physical. She drapes herself over people she likes. She doesn’t mean a lot by it."

Sienna acts like a slut. She can’t help who she is. I’d put on a wet suit though, before she sat on my lap.