The 26-year-old took to Instagram to post the snap, which showed Parker, one, looking cute in a trilby hat.
Singer Frankie, who is expecting her second child with husband Wayne, 34, gushed: “My blue eyed boy.”
Frankie and footballer Wayne recently revealed they’re having another boy – insisting that Parker will love having a brother.
Speaking to OK! magazine, Frankie said: “We’re both over the moon, I thought, okay, I’ve done this before so I’ll be fine!
“The only thing I was gutted about was that I don’t get to go shopping all over again. I’ve been going through all Parker’s old things for the baby.
“We’re both pleased because Parker’s a boy’s boy, he likes rough and tumble and he will love having a little brother.”
But, for now at least, Parker is blissfully unaware of the impending addition to the family.
Frankie continued: “He has no idea what’s going on! He just likes lying on my baby bump – it makes watching Monsters, Inc even better for him!
“He’s repeated the word ‘baby’ a couple of times but then if you ask, ‘where’s my baby?’ he just looks at you blankly.”