This scene is from Act Two of the first play in the trilogy,
LAVINIA--You better sit down. (Christine sits in the chair at rear center. Lavinia goes back to her father's chair at left of table.)
CHRISTINE--Well--if you're quite ready, perhaps you will explain.
LAVINIA--I suppose Annie told you I'd been to visit Hazel and Peter while you were away.
LAVINIA--(suspiciously) If what?
CHRISTINE--(quickly) Nothing. I only meant if I went off with Adam. But of course you know I won't do that. You know there's nothing I can do now--but obey your orders!
Full text of the scene available at: O’Neill, Eugene. Mourning Becomes Electra: The Homecoming. 1931. http://gutenberg.net.au/ebooks04/0400141h.html