Someone spoil the series for me and tell me how it ended

Bad guys got killed, everybody else got a happy ending.

Aye. They basically spent the season finding a place where all of the vested interests in the seestras were no long interested, so the remaining could live in peace.

All the sestras had a baby shower for Helena and she got babka cake and everything ! Oh and Rachel didn't attend because she's still a bitch, mind you Sarah's still a bitch but that didn't stop her so go figure.