Three big sisters surprise mom outside hospital window after baby brother is born

"I started crying," Amy Craig told "GMA."

Three sisters who were excited to welcome their newborn brother showed love from a safe distance as their parents looked on from a hospital window.

"I started crying," mom Amy Craig of Denham Springs, told "Good Morning America," of the surprise. "It was sweet, and I was glad we all had that special moment."

Amy and Justin Craig welcomed baby Brock amid the coronavirus pandemic. Amy Craig said this birth was quite different from that of her girls.

"During labor you had to wear the mask," she said. "I guess the biggest thing was no one could come visit."

"For me, I wanted them to be there," Craig added. "It was sad, but honestly once the news picked it up ... it became a big thing for them."

Craig said her husband texted a photo of the view from the hospital room window so her parents would know where to stand.

As for Addison, Kennedy and Cora, they're enjoying their newfound media fame, and their brother Brock.

"They are obsessed with him," Craig said.