"For me it's not really that big of a deal," Klum told PEOPLE at the Destination Maternity event in New York City, where she presented her new maternity collections Lavish by Heidi Klum for A Pea in the Pod and Loved by Heidi Klum for Motherhood Maternity, "because we're in love all the time."
In town for New York Fashion Week, where the supermodel also hosted the finale show for Project Runway's season 7 on Friday morning, Klum says her husband, who's staying in Los Angeles with their kids, is very attentive all year. "Some people complain about their spouses," she said. "That they forget or neglect [them]. I happen to be very lucky that my husband has not forgotten those things nor needs to be reminded."
But, she added: "I do love that there are those kinds of holidays for people to remember to acknowledge the fact that you have a great person in your life with you. So, I think to be reminded is good."
How's the latest love in Klum's life – 4-month-old daughter, Lou? "She smiles all the time," Klum, 36, said. "She can be on her stomach and lift her head up. She starts chewing on the chewing ring."
And, best of all, she fits in beautifully with her siblings, Leni, 5, Henry, 4, and Johan, 3. "They all love her," Klum said. "Leni, she has changed a few diapers. She closes her nose and goes, 'Oooo!' "
With four young children, the celeb mom easily tapped into the needs of a pregnant mom for her maternity lines. "When they asked me to do something with them I was very honored, very excited," said Klum.