Evelyn’s irritation reveals a deep-seated anxiety about her role as Celia’s partner. Even though she knows she couldn’t celebrate with Celia, Celia still wants her to have the reckless courage that’d allow her to go to the party, and Evelyn knows she lacks that. Again, when the couple is under stress, Evelyn attacks Celia’s dreamy idealism while Celia attacks Evelyn’s sexual history.