"I'm very excited to have a girl," Alves tells PEOPLE. "I'm happy and it's a big blessing. Vida's definitely a beautiful and peaceful girl. We are so lucky!”
Now that the Brazilian-born model, 27, and host of Bravo's hairstyling series Shear Genius has a daughter, she's looking forward to braiding and styling her baby's hair. But most importantly, Alves says she has advice to give from her own personal experiences.
"I'm going to have so much fun with her hair. I've been dealing with my own hair forever so I have a lot to share with her. It's going to be long talks.”
And has Vida’s 18-month-old brother Levi received his first haircut?
"We have not cut his hair yet. He's too cute. He's a little boy and I don't want to touch it. It's still pure and perfect! We're going to have so much time to style it and cut it," Alves says. "At this stage in his life, I'm leaving it as pure as possible."
When it comes time to break out the scissors, Alves says she will save a lock of hair in a scrapbook. "I'm pretty sure I'm going to do something like that. It's a very mom thing to do."
As for Matthew's Hair ...With hair being a central part of someone's appearance, does the model prefer McConaughey’s curly hair to be long or short?
"I like that Matthew has a little combination of both,” she said. "I like a little bit of a rough look because it's sexy. But when a man has a rough look and he goes and gets a cleanup than it’s very sexy as well."
And how does Matthew like her styled? “As natural as possible!”