The E4 drama returns to screens next week and sees Silas (Jeff Rawle) take a disliking to Porter's character Theresa McQueen, who is forced to stay behind in Chester as her family celebrates Mercedes's hen night in Ibiza.
Speaking to Digital Spy about the events that unfold, Porter revealed: "First of all, Myra cheekily pinches Silas's bum before leaving for Ibiza, but she puts Theresa in danger by blaming it on her. Silas always targets girls who he's not happy with because of the way they act.
"Also, he hates girls who are promiscuous and I think Theresa is probably a prime suspect there! She's always been one for boys, she's desperate for love and attention, and she enjoys receiving men's attention.
"But Theresa has no idea that Silas is targeting her, so she's just acting normally. Also, Silas is being clever by befriending Will while he's plotting against Theresa."
Viewers will see a bored Theresa play into Silas's hands by setting up an online dating profile, giving the sinister villain another chance to use the internet to his advantage.
Discussing Silas's behaviour in the late-night specials, Porter added: "It is unreal how scary he is! It's funny as Jeff Rawle is such a lovely man in real life. But watching the late-night episodes, you'll just be petrified. It is amazing."
Hollyoaks Later launches on Monday at 10pm on E4.
> Read our full Hollyoaks Later interview with Jorgie Porter
> Read more from Jorgie Porter in Soap Scoop
> Read more about the new series of Hollyoaks Later
Watch the official promo video for this year's Hollyoaks Later below: