Lima's return to the gym comes mere weeks after she and husband Marko Jaric celebrated Sienna's birth. "Marko and I are overjoyed to welcome Sienna into our family, and Valentina is looking forward to becoming a big sister," the model shared in a statement about Sienna, who was born at 1 p.m. and weighed in at approximately 7 pounds on arrival.
The model and her NBA star husband's older daughter, Valentina, was born in 2009 -- the same year they tied the knot. "My favorite job in the world is being a mom! My family could not be more happy," the model tweeted when confirming she was expecting Sienna in March.
As she and Jaric celebrate their newborn, the model mom tells Us Weekly big sis Valentina, 2, is already growing up fast. "She knows already how to count to five," Lima gushed to Us. "And she knows colors, like red, pink, white -- it's so cute! Everyday it's something new."