Madonna has paid for the mother of French dancer Brahim Zaibat to join them on vacation.
The group are holidaying at Hotel Du Cap, near Antibes, on the French Riviera.
Madonna has also invited all Brahim's cousins - which will leave her with a Â£100,000 bill for the week-long break.
'They're all going to relax with Madonna's four kids.'
Her eldest child - who works in the wardrobe department on her tour - is only eight years younger than the performer's boyfriend.
Madonna also has son Rocco with ex-husband Guy Ritchie and two adopted children David and Mercy.
She engaged with the small crowd who were watching her rehearsals ahead of a show in the country's capital, Kiev, to ask about the former Prime Minister, who was jailed in 2011 for her alleged abuse of office during her time in power from December 2007 to March, 2010.
In a video posted on YouTube, Madonna says: 'I don't even know the actual truth, I've just heard some stories from emails ... Is it true that the woman who was the former president (sic) is in jail here?'