The pair have had chemistry for some time and even shared a kiss last month, but have since been trying to ignore their spark.
Riley (Rob Norbury) has recently embarked on a casual relationship with Lynsey Nolan (Karen Hassan), while Mitzeee is about to be preoccupied with unwanted attention from her stalker.
However, Shenton told Soaplife: "She's in love with him and has been for ages, and I think he feels the same. But nothing is ever said - it's the elephant in the room. Perhaps they both fear rejection."
Mitzeee keeps quiet about her stalker ordeal next week to avoid worrying Riley, but later comes clean to him.
Shenton said: "She tells him and he's really sweet about it and says he'll be there for her."
Discussing the future of the stalker plot, she teased: "We'll see the stalking go to a whole new level. Until Mitzeee gets to a point where she arranges to meet the stalker."
Hollyoaks airs weeknights at 6.30pm on Channel 4 with a first look screening at 7pm on E4.
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