Olivia Culpo's youngest sister, Sophia Culpo, had a few things to say about her niece, Colette. A few days after Colette's birth, Sophia spoke in an exclusive interview with PEOPLE while at the Create & Cultivate Festival in Los Angeles. She shared what she thinks of her new niece.When asked about how she feels about being an aunt, she said:"It's the best! Best... Newborn bubble is just like, oh my God, I just wish I could smell her right now... I have to say she's a really good baby, knock on wood."At this time, Colette is just six days old. Sophia also added by saying that baby Colette has not been sleeping throughout the night yet:"... because she still needs to be eating in those increments, but she's great. She's just a great baby and she's so sweet and I'm just so obsessed with her."Olivia welcomed her first child with her NFL husband, Christian McCaffrey, on July 13 this year. Culpo took to Instagram to share the news of her baby girl's birth in a series of black and white photos. She simply captioned the post with her baby's name:"Colette Annalise McCaffrey 🤍" View this post on Instagram Instagram PostWhich dresses is Olivia Culpo saving for her daughter?Olivia Culpo's daughter is five months old now, and the former beauty pageant title holder has revealed that she is saving a few of her dresses for her daughter when she grows up.In an exclusive interview with PEOPLE, Olivia said:"I have a whole storage unit for her with all of my wedding dresses, my pageant dresses — all of my really valuable keepsakes."Colette can expect to see a few dresses that her mother wore while she was competing in the pageant shows. She even has the velvet dress that she wore while being crowned Miss Las Vegas in the storage.Olivia's wedding dress, designed by Dolce & Gabbana, as well as other dresses that she wore at her wedding, will be kept safe in storage.She concluded by saying:"You don't know how these pieces are going to wear and how valuable they can be someday... I look back at the clothes that I used to wear, and I miss them. I wish that I had so many of those pieces, because they are truly a moment in time, and it's so cool to be able to take somebody back in that way."Olivia Culpo's daughter gave Sophia Culpo baby feverSophia was asked if Olivia Culpo's new baby gave her baby fever, to which the 29-year-old responded:"Oh my God, it's bad. It's bad. I'm like, 'No, not yet.' I want one eventually, but not yet. Baby now? No."Sophia also said that Olivia Culpo's daughter is her fourth niece in the family, and she is looking forward to spending time with her when she grows up. The Culpo family has a strong female presence in the house, including Aurora Culpo, their oldest sister.She said:"Honestly, I'm really looking forward to including her with our ... because she's now my fourth niece and all the girls do matching PJs at Christmas, and it's just so cute to add another little member... So we have a strong girl squad going. So I would say just dressing and twinning. That's so fun. And I know my sister, Olivia, and her are going to have the cutest matching outfits."Sophia also revealed that Olivia Culpo enjoys being spoiled by her family members, especially after giving birth to Colette. She elaborated:"Oh, she's like, 'So you're coming over and making me cookies tonight, right? I thought I heard you say that.' I'm like, 'Did I?' But of course I will, because anything to see and cuddle my little niece and hang out with my sister... She loves having family around and she's very much in her little bubble, which who wouldn't be?"Olivia Culpo is enjoying motherhood and cherishing every moment with her daughter, Colette. She is also thoughtfully saving her special dresses as keepsakes for her child's future.Also read: Olivia Culpo opens up about hosting Super Bowl LIX and a fashion regret