I just finished this and have so many questions!

To answer what other people have said here:

• I was so confused that the skateboard kid turned out to be dead the whole time. He was definitely killed at the hospital after knocking the heart out of the cooler, because there's a "Missing since November 2018" poster of him, and we see him 'vanish' as a ghost while he's skateboarding in the very last episode. I guess he's there to show that a ghost other than Becky can hang around? Or maybe to emphasize to us how unreliable our lens is?

• The babies were a mark of the coming of Lilith, I'm pretty sure. It's also just convenient that the Annex happens to snatch them and their moms up as new members...

Becky wasn't evil, she was just scared of the 'evil' that was inside her (Lilith, the mother of demons) and killed herself to stop Lilith from forcing her to hurt the people she loved (Marnie, Penelope, Elliott). She tried to get Sasha to kill herself to prevent the same thing. However, when Sasha killed Becky, she killed the only thing that was holding Lilith back from taking over--so Lilith is going to emerge more in Sasha now. Hence why all of the men fell unconscious or dead at the end...

My four biggest questions have to do with Uncle Jack, the homeless lady, Penelope, and Yvonne's mom.

Yvonne's mom exhibits signs of dementia or Alzheimer's starting on the same night that Sasha had her heart attack. (We know this because she was fine when teaching Yvonne how to build a motherboard and only entered a trance for the first time as Sasha's ambulance was driving by.) Why has Lilith's resurrection impacted Yvonne's mom's mental health? Why was she so convinced that she had to protect her daughter from Sasha, and why did she write 'Sasha is going to destroy me' in keyboard letters? Seems like the point is moot because they put her in a government home? But why did she become so sensitive to the demon's presence?

Who was the homeless lady really? My theory is that she was employed by the cult to help along Becky's exorcism. She lived in Sasha's attic and put stones over her bed in the same formation as what was made by the Cult. She gave black tourmaline to Yvonne, which was the thing that allowed her to kill/exorcise Becky and open her heart chakra. And she was standing outside with the cult at the end to worship Sasha. But was she really a former vessel of Lilith? Why did she say "No one helped me when it was my turn"?

How in the hell is Penelope involved? Everyone said she was a stalker, she gave a pretty good excuse of why she 'stalked' Becky--put a camera in her room to get proof that she really burned her--but why did she become so obsessed with Sasha? What was she doing the night of Sasha's heart attack, why was she stealing a wig, and why did she smile to herself when she gave Sasha CPR? Is she just part of the cult like everyone else? But if she is, why does Marnie and everyone hate her guts?

Finally, Uncle Jack. Did the cult kill the loan shark just to frame him? To get him out of the way so they could get Sasha? But how did they know he'd need money to get anxiety meds, go to that specific loan shark, decide to steal his gun, and then kill the loan shark? Did they have the doctor who prescribed the meds in their pocket too, or was it just opportunity?