Sports Illustrated swimsuit model and actress Molly Sims has long donated her time to the Casa Hogar Sion orphanage in Tijuana, Mexico and recently she's started thinking about having children of her own.

"Absolutely my biological clock is running," Sims says in the winter/spring issue of Aspen Peak. In the magazine's cover story, Sims reveals: "I will adopt, and I definitely want to have my own children."