The actress, who reprises her role as Steph Roach in a one-off Boxing Day special, said that the cast of the Channel 4 soap is like family to her.
"Never say never, I think. I always said when I chose to leave, before I knew how I was going to leave, that I would come back," she told MSN.
"I love it there - it's like my second home. It's around the corner from my actual home and my family.
"I love my character but I couldn't tell anyone that I was going back because I didn't want to ruin the surprise. In the future, maybe another year down the line, Steph may come back. It depends on what I'm doing as well!"
Steph was killed off in a fire last December and Stenson is currently starring in the West End production of Legally Blonde.