Madonna got into a heated argument on the set of her husband Guy Ritchie’s new film, RocknRolla after a female crew member bitched about her adopted son took a swipe at the couple’s adopted son, David.

The 48-year-old Material Girl had brought two-year-old David Banda to the 3 Mills Studios, in Bow, East London, last Friday in what was meant to be a happy family outing.

Madonna overheard a conversation between two crew members soon after.

One of them asked the other what the baby’s name was. It is then claimed that one of the girls replied: “Lucky Bastard.”

“Madonna looked astonished by what was said and words were exchanged between them,” says an on-set source.

“Madge seemed very protective of her son and didn’t want anyone talking of him in such a manner.”

“At the end of the day, she’s just a mom and doesn’t want anyone speaking ill of her family. She looked really hurt and shocked by the comment and let her feelings be made known.”