SPOILER ALERT: This story contains details about Tuesday night’s summer finale of Pretty Little Liars.

Last night’s summer finale of Pretty Little Liars served up plenty of fodder for social media with a gruesome death scene, romantic reunions and shocking revelations. Executive producer I. Marlene King spoke to reporters today about the finale and what’s to come in the last half of Season 7, which will serve as the finale of the Freeform series.

One of the biggest shockers last night was Mary Drake revealed as the birth mother of Spencer Hastings. “That’s a huge revelation not just for Spencer but for the pretty litter liars and for the storyline,” King said. “It’s a driving engine of Spencer’s emotional story as we come back next April.”

Pretty Little Liars Season 7 Panel, Los Angeles, USA - 15 Jun 2016
REX/Shutterstock

Now the question is who is Spencer’s father? And who is the father of Mary Drake’s other daughter Charlotte? King assures all will be resolved in the end. “We’ll definitely follow through on both of those storylines,” she said today. “We will find out who Charlotte’s father is and we will find out how Spencer came to be and her entire family dynamic.”

The big Spencer reveal came as she hung onto the brink of life, after being shot by a vengeful Jenna. Its hard to imagine the show killing off any of the original liars, but King insists on the possibility. “Spencer, like every other character on the show, is subject to their demise,” she said, adding,  “‘A” is a equal-opportunity killer.” As is tradition with PLL, they may be gone but not forgotten. “It’s possible that we’ll see them in flashbacks,” King said.

Also on the horizon for Season 7B, which takes place “moments” after the end of the penultimate finale, is Alison’s pregnancy, which King described as not “average” and will have an affect on Emily. The Emily-Alison-Paige love triangle is not done either. “Paige is not gone for good… having that triangle play out felt appropriate for us as storytellers,” she said. Further, though we were left in the dark on the fate of Aria and Ezra’s upcoming nuptials, Kings divulges that “there will be more than one wedding in 7B.”

Also being introduced next season is the Addison, a pretty little bully who is every insecure high school girl’s worst nightmare. When asked if this was a way to continue the show without the original liars, King said it was their way of “coming full circle on the show. Although we may be saying goodbye to our current group of pretty little liars in the town of Rosewood, it’s its own character and we’re bringing Addison in that world to really layer that theme. We are going to have a lot of fun exploring her and her dynamic with our liars.”

As for the decision came to end the series after Season 7, King said: “It was process for everyone. Creatively, I’ve always known what these last 10 episodes would be, just not necessarily when they would be.” She said the “conversation started in Season 5,” and the decision was made as a team. “We all came to the conclusion that we want to go out on a high and we wanted to go out in a spectacular way with our fans excited to tweet about the show and engage in the show and it just felt organic. It felt like the right time and the right way to do it.”

When probed about a potential film, King said, “The last episode will be treated as a two-hour movie” but did not rule out the possibility of a future movie. “I always say to myself, ‘How I can make myself feel better about the show coming to an end?’ We’re open to finding ways to keep theses characters alive. I hope that down the line we find a way to bring all the girls back together again. It’s such a fun world to play in that we’re all just keeping those options open.”

Season 7B of Freeform’s Pretty Little Liars returns in April.