Wiederhorn announced the happy news Sunday on Instagram

Credit: Jason LaVeris/FilmMagic

Kim Richards is going to be a grandmother!

The Real Housewives of Beverly Hills star’s daughter Brooke Wiederhorn is expecting her first child – a baby boy! – with her husband Thayer Wiederhorn.

Brooke, 30, announced the happy news Sunday on Instagram, sharing a picture of an adorable Easter basket.

“Happy Easter!” she captioned the shot. “Can’t wait to meet our baby BOY!”

The news comes as Richards, 51, has been working hard to stay sober after a difficult year.

RELATED VIDEO: The Real Housewives of Beverly Hills Star Kim Richards Says She’s Staying Sober for Her Kids

Earlier this month, the reality star opened up to PEOPLE about why she’s maintaining her sobriety for her four kids: Brooke,Whitney, 26, Chad, 24, and Kimberly, 20.

“I felt terrible for my children,” Richards told PEOPLE exclusively of how she felt about her public intoxication arrest last year. “That was the thing that bothered me most. I cried because I hurt my kids.”

Richards also explained her recovery was particularly important to her because she wants to be able to enjoy her future grandchildren.

“I’ve made mistakes, but I keep trying,” she said. “I’ve never done anything intentionally to hurt my children. And I hope, for their sake and for the sake of one day my beautiful grandchildren who will come, that this is it.”