What is the conclusion of Top Girls?

Alone, Marlene sits wrapped in a blanket and pours herself another drink. Angie comes into the room and calls out “Mum?” Marlene says “Angie? What’s the matter?” and again Angie calls out “Mum?” Marlene replies, “Not, she’s gone to bed. It’s Aunty Marlene.” Angie then says “Frightening” and when Marlene asks if she’s had a bad dream and suggests things are fine now because she’s awake, Angie again says “Frightening” and the play ends.