The pair welcomed their sixth child, daughter María Lucía Victoria via surrogate, born just five months after Hilaria, 37, gave birth to their son Eduardo "Edu" Pao Lucas back in September. Get push notifications with news, features and more. + Follow Following You'll get the latest updates on this topic in your browser notifications. "For Hilaria, having two babies so close in age is pretty crazy, but she still loves it," a source tells PEOPLE in this week's issue, on newsstands Friday. "Lucía is perfect. She fits right in." Diapers and double the baby duties aren't the only challenges facing the couple, though. Earlier this month, Alec, 62, announced he was quitting Twitter when he received backlash. And, in December, Hilaria's name began trending online when people claimed she fabricated Spanish roots and a Spanish accent despite being born and raised in the United States. She since apologized for not being "more clear" about her background.