Chrysothemis comes onstage and converses with Electra. She explains that their mother had a bad dream about Agamemnon, and sent her with libations for his grave.
The two sisters argue about the best course of action with regard to their murderous mother. Chrysothemis makes it clear that she agrees with Electra – their mother and stepfather are guilty – but maintains that no good can come of snubbing them. She's a pragmatic gal, and she's trying to do what makes sense.
When Electra orders her to put a lock of her own hair on Agamemnon's grave instead of the libations her mother sent, Chrysothemis agrees to do so.
In other words, she's fine with rebellion, as long as she doesn't get caught.
Chrysothemis returns later to Electra with fantastic news – Orestes is back. Apparently, she saw libations on Agamemnon's grave that could have only come from him, including a lock of his hair that she recognized.
Chrysothemis is then distraught when Electra reveals that it couldn't have been Orestes, since he's dead.
When Electra asks her to help kill the King and Queen, Chrysothemis refuses; but she does promise that she won't reveal Electra's plan to murder the royal couple.