Stella embarked on a relationship with builder Jason Grimshaw (Ryan Thomas) late last year, sparking gossip on the cobbles over the pair's age difference.
Collins told Inside Soap: "People do keep asking me what it's like to kiss Jason - he's a very popular lad among women and men! When I first heard about them getting together, I thought, 'Wahey! Bring it on', and it's been really fun.
"I'm not sure that Jason is what Stella wants for the rest of her life, though. I don't think they are a match intellectually, and she'll want a fella she can really talk to. But I'm enjoying working with Ryan Thomas - it's great fun."
Asked whether Stella's cheating ex-partner Karl (John Michie) could ever win her back, the actress replied: "You can see that Karl really wants to be back with Stella and is worming his way back in. We've been filming some scenes where Karl is trying to get back in with Gloria, because he thinks she's a soft touch, and may well help him get back with Stella. He's using plenty of different tactics."
As previously reported, Gloria returns to Weatherfield in a few weeks' time alongside a new love interest named Eric, played by veteran actor Timothy West.
Of West's casting, Collins commented: "That's amazing, isn't it? When we filmed the scenes where they arrive on the Street together, I just kept thinking, 'Oh my God, I can't believe this! I'm in Corrie with Sue Johnston and Timothy West! I need to pinch myself! How amazing is this?' I love Gloria and Stella because they bounce off each other. They are yin and yang."
Coronation Street airs Mondays, Wednesdays and Fridays on ITV. Get the Inside Soap magazine on your iPhone or iPad