And if you've been following their journey to date, you'll likely notice the pair are very quickly approaching their due dates.
But before their new babies arrive, they ensured time for one, final playdate.
Sharing the cute image on Instagram, Jayne and Sylvia spent a sunny playdate with their one-year-old sons in a park.
"Next time we'll be outnumbered @sylviajeffreys!" Jayne captioned the picture.
She added the apt hashtag, #bigbrothersintraining.
Sylvia reshared the pic to her own Instagram story, writing, "Soon there'll be six".
She also added several brain explosion emojis, which we can't blame her for - two work wives with two children under two isn't a common occurrence though all the more glorious that they have each other to embark on the journey together.