Ok I just had a crazy thought
What if the whole Emison baby is a clue to Melissa being behind everything?
Maybe that baby Melissa lost wasn’t Ian’s at all but it was Wren’s?
Maybe they’re working together, planning to take the baby from Alison and Emily because they think the Liars made her lose it in the first place?
Idk, I know it’s way out there but we all know this show has gone beyond logic more than once, and with Marlene all I’m saying is you never know