Like her 42-year-old sis, Mónica wasn't shy about showing off her sexy figure in front of photographers, flashing her toned abs in a white bikini with gold chain straps. She completed her look with a pair of oversized sunglasses, a glowing tan and a striking smile.
Mónica didn't enjoy her beach day adventures alone, however -- she brought along her 3-year-old daughter, Antonella, and their two dogs.
Back in 2013, the dancer and actress revealed via her blog that she was pregnant by an anonymous sperm donor.
"I'm going to be a mother!" she wrote in the post, titled My Life's Dream. "I have managed to fulfill the dream of a lifetime. Because of that, I want to share with all of you this special journey and be able to tell you about all of my experiences during this fascinating time..."
"A 40-year-old woman is very young and she feels very young, but the maternity thing goes another way. It is measured with another clock that unfortunately we do not control," she said at the time. "I've become very informed on the subject. It turns out that after 37, the possibilities of becoming pregnant decrease at an alarming rate."
"I've decided to talk about it: I have resorted to artificial insemination in order to get pregnant," Mónica concluded. "I also wanted to talk about it because it is an opportunity to show my gratitude to all those anonymous donors that help a lot of women, like me, fulfill their lifetime dream. If with this I can help others that are in doubt, here I am for whatever you may need."
Perhaps little Antonella will follow in her aunt Penélope's modeling footsteps some day? The actress appeared on the cover of Vogue magazine earlier this year, showing off her best "Blue Steel" pose with her Zoolander 2 co-star, Ben Stiller.
To hear more (and see the pics!), watch the video below.