He's already boasted about how good he is at keeping a secret — and by the looks of his glowing wife, it seems Rove McManus is staying mum again.

A rugged-up Tasma appeared to be sporting a small baby bump as the newlyweds jetted back into Australia after their African honeymoon.

Although Rove went to almost farcical lengths to deny he and Tasma are expecting following their surprise wedding, there's no denying the pair are more clucky than ever.

Last week Tasma couldn't hide her delight at being Rove's wife. "I'm enjoying married life and feeling like I'm 60 because everyone calls me Mrs McManus," she told News Ltd.

The couple, both 35, wed in a surprise ceremony in mid-June, telling only a handful of people of their plans. It was only after the quiet and intimate ceremony that they announced their marriage to the world.

And friends suspect they may do the same with any baby news, despite Tasma revealing recently that "more and more, the idea of having a child appeals".

While they spent most of their three-week break visiting wildlife projects in Mozambique with Rove's charity Fauna & Flora International, they also spent several days unwinding on their own with a luxurious break in Cape Town.

Although the couple had to delay their honeymoon to fit in with Rove's commitments for Are You Smarter Than A 5th Grader? their break had the same fuss-free feel as their wedding.