Kambua shared the picture below, looking happy and excited to be having her first child.
She shared a photo of herself showing off her bulging baby bump followed by a blue hearts emoji caption.
Kambua has been married for seven years.
She has in the past expressed disgust over constant questions by strangers on why she had no baby.
A couple of celebrities like Mercy Masika, Grace Msalame, Alice Kamande among others have congratulated her on social media.