Eudoxia says that it is Peter's duty to marry Xenia. Peter makes a promise to his mother, but after Evdokia leaves, he does not hide his anger at Xenia. Filer informs Mongo that Peter was dating a girl in the park who is expecting a child from him. Mongo decides that it is his wife. Nobly wanting to put an end to all this, he goes to Peter to abandon Olga. Because of the misunderstanding between them, a quarrel breaks out.