The couple, best known for their respective roles as David Metcalfe and Debbie Dingle, became parents for the first time in April when they welcomed the arrival of baby boy Buster Lawrence.
Speaking to Inside Soap about the possibility of extending their family, Wolfenden admitted: "I would love three children. It's been the best thing that's ever happened to us.
"We'd like to tie the knot beforehand, though - I've always wanted to marry Charley."
Meanwhile, discussing the pair's decision to call their first child Buster, the star said: "It's a name we'd heard of because of actors such as Buster Merryfield and Buster Keaton. He was 8lb when he was born, which is a good weight, so he looked like a Buster - it was perfect for him."
Wolfenden and Webb have been in a relationship for over two years.