Some trouble is brewing on Witches of East End when the storyline between Killian and Freya continues with Eva plotting to get in the way.

'Frillian' Will Happen In 'All Different Forms' On 'Witches Of East End'

On Wednesday, International Business Times posted an interview with executive producer Maggie Friedman who mentioned what's going to happen next after discovering that Eva's been poisoning Killian.

"She's been giving him a potion that makes him love her and forget that he's in love with Freya," Friedman said. "So, it's a little bit of a mind control. He doesn't realize that his heart and mind are being controlled by his wife. So, that story line is going to heat up more."

Chatter On Killian's Bad News From Freya

The producer then teased a detail that will have the fans excited if they've been rooting for something to happen between Killian and Freya.

"And the next episode it's Freya's 30th birthday party and Killian is working the bar. And I will say Frillian fans will really love the next episode," Friedman said. "We're also going to learn a lot more about Eva's back-story and why she's doing what she's doing - who she is. There are a lot of fun twists that get revealed in the next episode related to Eva and Killian."

As Eva's motives are revealed, it might come with a bit of a shock.

"It's really going to freak people out," Friedman said. "I think it's a really cool, really surprising, really twisty story about why she's doing what she's doing."

Witches of East End airs on Sundays at 9 p.m. ET on Lifetime.