The reality star exclusively confirmed to PEOPLE that she was expecting her first child in May

Grandchild on the Way! See Sister Wives Star Maddie Brown's Woodland-themed Baby Shower

Sister Wives‘ Brown family is close to welcoming their first grandchild.

Maddie Brush (née Brown) and her husband Caleb Brush celebrated the upcoming arrival of their first child together on Sunday with a two-hour woodland-themed baby shower.

Get push notifications with news, features and more.

The reality star, 21, wore a gray dress and floral belt above her growing baby bump, while her husband dressed casually in a red flannel shirt and baseball cap.

Maddie exclusively confirmed to PEOPLE that she was expecting her first child in May. Maddie’s father, Kody Brown, and his four wives have a combined 18 children, but this will be the first grandchild for the family. (Maddie’s biological mom is Janelle Brown.)

“We are both really excited and anxious,” said Maddie. “I think every soon-to-be parent is anxious, but we have so much support from both sides of our family.”

In January, Maddie announced they were expecting a son, sharing a photo on Instagram featuring the duo kissing while surrounded by blue balloons.

“Little baby boy Brush! We can’t wait to meet you!!” she captioned the image.

FROM COINAGE: The True Cost of Famous TV Apartments

As far as what the baby will call all four Sister Wives is still up for discussion.