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Madonna's bro, Christopher Ciccone, isn't just revealing intimate stories about his sister, now he's going after her friend Demi Moore!

According to the Sun, Ciccone says:

"We went out and Demi was dancing up on me and humping me from behind. She was lactating at the time and she was squirting breast milk at my lesbian friends. My friend Michelle called me the next morning and asked me: ‘How do I get breast milk out of my black dress? I replied: ‘How the f*** would I know? Call Demi!’"

Ewwwww!