Cardi B and Kulture attended her fourth birthday party dressed in matching mermaid costumes.

On Sunday, the “Up” singer shared a slideshow of adorable photos from the lavish events—which also included husband Offset and their 10-month-old son, Wave—on Instagram.

In an interview with Vogue Singapore earlier this week, Cardi discussed why she has never hired a babysitter despite having intended to do so before becoming a mother.

Cardi is aware of the help she receives from her husband and family, but she admits she doesn’t abuse her mother Clara Almánzar’s generosity by asking her to watch Kulture and Wave.