The actor's character Ste Hay has a tough time ahead in the coming days as his boyfriend Doug Carter (PJ Brennan) prepares to marry flatmate Leanne Holiday (Jessica Forrest) in a scam to secure his wedding inheritance.
Although the sham wedding was Ste's idea, he does a u-turn next week by issuing an ultimatum on the eve of the ceremony.
Richardson told All About Soap: "He says to [Doug], 'You either tell your parents that we're a couple, or I'll do it for you!' It's left on a bit of a cliffhanger, so viewers will wonder whether Doug can work up the courage to come out to his folks."
Asked how things progress the next day, he replied: "Well, a wedding does happen, but I'll leave you guessing whether it's Doug and Leanne, or Doug and Ste. Ste will be heartbroken if Doug marries Leanne. It's a brilliant episode, but that's all I'm saying."
Richardson predicted that Ste and Doug's relationship is strong enough to survive the dramas ahead.
He explained: "I think they'll always find a way back to one another in the end. Neither Ste nor Doug are angels - they're fiery, but are also well suited. They have a completely different relationship from what Ste had with Brendan."
However, asked whether he can see Ste ever reuniting with Brendan, the 26-year-old replied: "I'm not sure, because so much has gone on between them. It depends on whether Doug goes ahead and marries Leanne. If he does, I think Ste's relationship would be seriously affected, and he'd probably run back to Brendan."
Hollyoaks airs the wedding episode on Friday, September 7 at 6.30pm on Channel 4.
> Read Jessica Forrest's recent interview with Digital Spy about the storyline
> Read more 'Hollyoaks' spoilers and news
Gallery - behind the scenes at Doug and Leanne's wedding:- Get the Inside Soap magazine on your iPhone or iPad