The couple's romance storyline began when Sonya was introduced to the soap in late 2009, and viewers have since seen them overcome various obstacles together.
© Channel 5
© Channel 5
Moloney told The AAP of the pair's future: "I think they're well-matched. I think they'll be together for a while, although they're going to go through the ups and downs every relationship faces.
"The thing about these two is it's not a question of them loving each other, it's a matter of whether or not things go their way."
Discussing Toadie's romantic history, he continued: "I have no idea how or why but he's done okay, hasn't he? I think it's the thing of everyone wanting to see the underdog enjoy some kind of victory."
Toadie's current storyline on screen in Australia has seen him framed for a brutal attack on teen Chris Pappas (James Mason).
Moloney added: "He has to fight his way out of that one - with a bit of legal skill and a bit of sneakiness."
Neighbours returns to Channel 5 in the UK next week.
> Neighbours Toadie linked to shock finale attack
> Neighbours' Toadie to be framed for attack
> Read more Neighbours spoilers and news
