While she hopes to have children one day, the 35-year-old actress said she isn't thinking of having them just yet.
"I want to have babies one day but not right now," she said. "When I do it I want to do it really well. I want it to be my best project in life."
In addition to her film career, it seems Penelope already has her hands full, mothering those around her.
"I have a tendency to become a mother to everyone around me. My brother and sister are always complaining that I'm too protective," she revealed. "I talk to them both every day, no matter where I am."
But while Penelope is happy to talk in general terms about her life, specific details about her relationships are off limits.
"It's always a trap to share your secrets," she said. "I did that when I first got attention as a teenager, acting in Spain. I would get so upset because I'd talk about a movie for two hours and then all I'd read was something personal that I'd talked about."