Madonna is opening up about life with her youngest daughters. The Queen of Pop added to her family in February 2017, when she adopted twin daughters Estere and Stella from an orphanage in Malawi. Now 12, the girls have returned to their home country many times with their famous mom, who met them while doing work for her charity, Raising Malawi —and she's giving a rare update on the twins. “The girls have a lot of empathy for vulnerable children in need of life saving medical care,” Madonna, 66, tells PEOPLE exclusively of their travels back to Malawi with the nonprofit, “and they are very grateful to be living in a country where medical care is readily available for people.”Madonna Reveals Why Raising Malawi Brought Her 'So Much Closer' to Her Kids as Charity Launches New Initiative (Exclusive) Madonna is also mom to adopted children David Banda and Mercy James, both 19, as well as daughter Lourdes Leon, 28, and son Rocco Ritchie, 24, from previous relationships. Giving back has become...